Eden Openly

How NHS England’s revised hospital accommodation guidance uses its sources

Evidence Note · EN-026

Evidence summary

Question
How does NHS England’s revised guidance on hospital accommodation use its legal sources and its predecessor, what does it cite for its factual propositions, and what does it leave unspecified?
Method
Textual comparison of the guidance with the Equality Act 2010, the Supreme Court’s judgment in For Women Scotland, the EHRC’s statutory code of practice, the 2019 guidance it replaces, and the HSSIB recommendation it was said to answer. Retained copies of every source are held, with hashes (see Data availability). Not a systematic review, and not legal advice.
Overall certainty
Not graded. This note establishes what the documents say and how they relate. It assigns no certainty grades.
Reading time
About 19 minutes
Companion review
None (standalone Evidence Note)
Document examined
NHS England, Privacy, dignity and safety in hospital accommodation, publication reference PRN02528i, 15 October 2026
DOI (all versions)
10.5281/zenodo.23433542
DOI (this version)
10.5281/zenodo.23433543 (Evidence Note EN-026, version 1.0, 17 October 2026) · PDF →
Companion guides
For patients → · For clinicians →
Data and verification
Claim register (PDF) · Quotation check (CSV) · Source manifest (PDF)

On 15 October 2026 NHS England replaced its 2019 guidance on same-sex hospital accommodation. Under the new guidance, trans patients “should be accommodated in line with their biological sex”. The 2019 guidance said they “should be accommodated according to their presentation”.

The rule combines law and policy. The Supreme Court’s judgment in For Women Scotland establishes that “sex” in the Equality Act 2010 means biological sex. The Act’s exceptions permit separate and single-sex services, subject to statutory conditions and proportionality. The EHRC’s statutory code explains how it reads those exceptions. None of these sources, by itself, sets out NHS England’s default placement rule. That rule is NHS England’s policy for delivering a pledge in the NHS Constitution, which the Constitution says is “not legally binding”.

The guidance compresses its legal sources. The guidance paraphrases the code. The biological-sex element of the paraphrase is in the code, but the paraphrase does not itself state the statutory conditions or proportionality requirements that the Act attaches to sex-restricted services. The guidance does not mention the Act’s separate exception for communal accommodation. This note does not establish whether that exception applies to hospital wards.

Its factual propositions carry no cited empirical basis, and several are inherited. The guidance cites no studies, datasets or evidence syntheses. Several of its propositions appeared in the 2019 guidance, also without a cited basis. This note does not establish whether supporting evidence exists elsewhere, or whether the propositions are true.

It does not reproduce the 2019 guidance’s specific procedures for trans and non-binary patients. The 2019 guidance told staff to ask discreetly where a patient would be most comfortable; to infer from presentation for a patient who was unconscious or incapacitated; not to investigate genital sex unless treatment required it; and to ask non-binary patients their preference. The 2026 guidance offers general decision principles, an individual assessment, a single-room offer and a clinical exception, but no comparably specific procedure for these situations.

It addresses the HSSIB recommendation through general principles; some requested populations and aims are not expressly developed. HSSIB recommendation R/2024/041, from a report published on 24 October 2024, asked for guiding principles for mental health inpatient care, “including patients who are transgender and non-binary”. NHS England said the revised guidance would meet it. The guidance provides general decision principles. It does not expressly name non-binary patients, or set out a distinct framework for therapeutic mental health environments. This note has not assessed implementation, or whether HSSIB regards the recommendation as met.

The reporting guidance at the linked page predates it. The guidance says “related reporting guidance has also been updated”. When last checked, at 03:48 UTC on 17 October 2026, the linked page offered collection guidance marked “Updated: October 2019”, built on the 2019 policy. That collection guidance counts only “unjustified occurrences” of sleeping-accommodation breaches; the 2026 guidance says “All breaches of same-sex hospital accommodation must be reported”. That is a difference in the documents’ stated terms, not an established change in what is counted. This note does not establish that no updated specification exists elsewhere.

Update, 20 October 2026. After we reported this on 17 October, NHS England replaced the collection guidance on the linked page with version 1.6 (“Updated: October 2026”), which reflects the 2026 guidance, removes the ‘unjustified’ and ‘justified’ terminology and applies from October 2026 data. The finding above describes the page as it stood when checked; see section 5 and the revision history.

This note does not determine the policy’s overall merits, which involve legal, clinical, empirical, ethical and political questions.

Scope

This note compares documents. It examines one document, NHS England’s Privacy, dignity and safety in hospital accommodation (PRN02528i). It reads alongside it:

It asks four questions:

  1. How does the guidance represent its legal sources?
  2. What changed from 2019, and what was carried over?
  3. What does it cite for its factual propositions?
  4. What does it leave unspecified?

What this note does not do. It does not judge whether placing trans patients by biological sex is right, lawful in any particular case, or safe. It does not appraise the research evidence on hospital accommodation. It does not examine local trust policies or contracts. It examines the collection guidance publicly linked from NHS England’s statistics page. It has not inspected the current SDCS submission form, system instructions or any reporting specification distributed through another route, and has not established which technical instructions providers are currently using. It does not assess how the guidance is implemented.

It distinguishes three levels throughout: national policy design, provider implementation, and the individual decision at the bedside. Each raises different legal and evidential questions, and a national document may properly leave some detail to local implementation.

This note is not legal advice. No lawyer has reviewed it. Where a point turns on how the Equality Act applies to hospital accommodation, it is stated as an open question, not a conclusion. The note does not alter NHS England’s published expectations, or determine any provider’s legal duties.

The aim is to treat “the evidence is too weak to show benefit” and “the evidence is too weak to show harm” as the same kind of claim, judged by the same rules. Here that means reporting where the guidance is careful and accurate as fully as where it is not.

The status of the sources

The sources carry different legal weight, and the guidance does not always say which is which.

Source What it is Legal weight
Equality Act 2010 Primary legislation Binding. Schedule 3 paras 26–28 permit separate services for each sex, services for one sex only, and related gender-reassignment differences, each subject to conditions and to being “a proportionate means of achieving a legitimate aim”. Schedule 23 para 3 is a separate exception for communal accommodation
For Women Scotland [2025] UKSC 16 Supreme Court judgment interpreting the Act Binding interpretation: “sex”, “woman” and “man” in the Act mean biological sex (para 264)
EHRC Code of Practice for services, public functions and associations (2026) Statutory code of practice, in force 5 August 2026 “The Code does not impose legal obligations. Nor is it an authoritative statement of the law”. Courts and tribunals “must consider any part of the Code that appears relevant” (para 1.6)
NHS Constitution, same-sex accommodation pledge A pledge, not a right “pledges are not legally binding but represent a commitment by the NHS to provide comprehensive high quality services”. The pledge’s status does not remove other duties that apply separately
NHS England guidance (PRN02528i) National guidance to NHS providers Sets out how NHS England expects providers to meet the pledge

What the guidance requires

These points summarise the guidance as retained (source 1).

1. The rule combines law and policy

The guidance follows its rule on trans patients from a legal premise. It introduces the rule with “Therefore”, after stating that the code says single-sex services “should be provided on the basis of ‘biological sex'”. The guidance introduces the placement default through its account of the legal framework. It does not explicitly claim a demonstrated comparative safety benefit for that default, and it does not say that the default puts trans patients at risk. This note does not assess whether such benefit or harm could be demonstrated. The guidance should be credited for not presenting the default as a demonstrated outcome.

The rule rests on three different kinds of source:

  1. A judicial interpretation of legislation. “Sex” in the Equality Act means biological sex (For Women Scotland, para 264).
  2. Statutory exceptions, and the code’s account of them. The Act permits separate services for each sex (Sch 3 para 26) and services for one sex only (Sch 3 para 27), each where its conditions are met and the provision is “a proportionate means of achieving a legitimate aim”. One of the para 27 conditions is that “the service is provided at a place which is, or is part of— (a) a hospital” (para 27(5)). Gender-reassignment discrimination in those services is permitted where “the conduct in question is a proportionate means of achieving a legitimate aim” (para 28). The code explains that a single-sex service which admits people of the opposite biological sex “will no longer be a separate or single-sex service” (para 13.144).
  3. NHS England’s operational policy. NHS England chose to deliver the Constitution’s pledge through a national default, with individual clinical exceptions.

The meaning of sex under the Act, and the justification for restricting a service by sex, are distinct questions. Where a provider relies on an exception permitting separate- or single-sex provision, the relevant statutory conditions and proportionality requirements must be satisfied.

The guidance states a national default and provides for individual clinical exceptions. It does not explain how proportionality is to be assessed at each level: national policy, service design, and the individual decision. Nor does it say how those assessments relate to its clinical exception. Clinical appropriateness is not the same as the legal test of proportionality. The covering letter asks boards to ensure local decisions are “lawful, proportionate, evidence-based and clearly documented”. It also asks that their plans include “reviewing or revising decisions where evidence or circumstances change”. This note has not established whether separate proportionality assessments exist, at national or provider level.

Under the code, deciding whether a single-sex service is proportionate means weighing “the benefits of offering the service as a separate or single-sex service”, “the needs of those who are accessing it” and “the impact on those who are excluded from accessing it” (para 13.115). Those are partly factual questions. The guidance cites no evidence on them.

For Women Scotland did not decide anything about NHS England’s hospital accommodation policy. It did name “female-only hospital wards and changing rooms” among its examples of single-sex services, when explaining Schedule 3 paragraph 27 (para 215).

2. How the guidance represents its legal sources

The guidance paraphrases the code. The guidance says the code “says that single-sex services, such as hospital accommodation, should be provided on the basis of ‘biological sex'”. That is a paraphrase: no sentence in the code reads that way. The biological-sex element is in the code (paras 2.49, 13.130, 13.144). The code also gives a single-sex women’s hospital ward as an example of lawful provision (para 13.106).

The paraphrase does not itself state the statutory conditions or proportionality requirements, and so leaves out the structure of the exceptions. The code does not say that services should generally be single-sex. It explains the conditions under which separate- or single-sex provision is lawful, and what follows if a service relies on them. Its own example begins “A hospital chooses to provide a single-sex hospital ward” (para 13.106). The paraphrase also does not distinguish separate services for each sex (Sch 3 para 26) from services for one sex only (Sch 3 para 27). A system of paired male and female wards may raise different questions from a single women-only ward. This note does not decide how NHS inpatient accommodation is characterised under those paragraphs.

The “necessary for everybody” passage. NHS England invokes the code’s principle concerning services “necessary for everybody”. The code itself states:

“In the case of services which are necessary for everybody… it is very unlikely to be proportionate to put a trans person in a position where there is no service that they are allowed to use.”

This extract is from para 13.148, with “such as toilets” omitted at the ellipsis. NHS England uses the same substantive principle, introduced with its own words (“services that are”), so its sentence is not an exact transcription of the code’s. The code illustrates the principle with toilets. NHS England invokes it for hospital accommodation, where a trans patient’s clinical needs cannot be met on a birth-sex ward. That may be a direct application of the general principle, or an extension by analogy; which it is depends on the circumstances and on legal analysis. The code does not specify the resulting inpatient placement.

The guidance does not mention the communal accommodation exception. Schedule 23 paragraph 3 is a separate statutory exception. It defines communal accommodation as “residential accommodation which includes dormitories or other shared sleeping accommodation which for reasons of privacy should be used only by persons of the same sex” (para 3(5)). The exception applies only if “the accommodation is managed in a way which is as fair as possible to both men and women” (para 3(2)). Account must be taken of whether the accommodation could reasonably be “altered or extended” or further accommodation provided, and of “the frequency of the demand or need for use of the accommodation by persons of one sex as compared with those of the other” (para 3(3)). In relation to gender reassignment, account must also be taken of proportionality (para 3(4)).

The code explains that excluding a person “from use of communal accommodation provided for their own sex because of gender reassignment will only be lawful if it is a proportionate means of achieving a legitimate aim” (para 13.159). That concerns exclusion from accommodation for the person’s own sex. It is a different question from exclusion from accommodation for the opposite sex.

Schedule 23 paragraph 3 is a potentially relevant alternative or additional statutory route. This note has not established which inpatient arrangements engage it, or whether its omission changes the guidance’s legal analysis.

The link to the code is correct. The guidance links to a GOV.UK address that contains the word “draft”. The publication page records “Updated text as the code is no longer in draft” on 15 July 2026, and says “The Code came into force on 5th August 2026”.

3. What changed from 2019, and what was carried over

The 2019 guidance was read in an Internet Archive copy, captured 8 January 2026, of the page as last updated on 24 April 2025. That update added a note that the guidance was being reviewed following For Women Scotland. The table compares specific passages in the two documents. It describes what the 2026 document contains. It does not establish whether arrangements outside the document (contracts, technical reporting instructions, local policies) have changed.

Topic 2019 guidance 2026 guidance Comparison
Placement of trans patients “Trans people should be accommodated according to their presentation: the way they dress, and the name and pronouns they currently use” (Annex B) “should be accommodated in line with their biological sex” (section 4) Reversed
Establishing where to place a patient Where staff are unsure, “ask discreetly where the person would be most comfortably accommodated” (Annex B) General principles: “ask patients what matters to them”, decisions “made in partnership with the patient wherever possible” (section 2). No specific procedure for establishing sex Specific procedure not reproduced
Unconscious or incapacitated patients “inferences should be drawn from presentation and mode of dress”; “No investigation as to the genital sex of the person should be undertaken unless this is specifically necessary to carry out treatment” (Annex B) Not addressed Not reproduced
Non-binary patients “should also be asked discreetly about their preferences, and allocated to the male or female ward according to their choice” (Annex B) Not expressly addressed Not reproduced
Single or side rooms Privacy “can usually be ensured through the use of curtains or by accommodation in a single side room adjacent to a gender appropriate ward” (Annex B) Single-bed rooms “should be offered” on the basis of privacy, dignity and safety for all patients; “No patients have a legal right to be accommodated in single rooms” (FAQ 7) Rationale broadened; offer and legal-right wording added
Excluding a trans person from a ward “only if this is a proportionate means of achieving a legitimate aim”, case by case, based on “an objective and evidence-based assessment of the circumstances and relevant information” (Annex C, FAQ 18) Placement by biological sex is the default; departure on clinical grounds, assessed case by case (section 4) Default reversed; the 2019 reference to an evidence-based assessment is not reproduced
Patient choice “Patient choice for mixing must be considered and may be justified” (section 1.4) The word “choice” does not appear. Decisions “made in partnership with the patient wherever possible” (section 2) Wording changed
Urgent admission “There are times when the need to urgently admit and treat a patient can override the need for complete segregation of sexes” (section 1.6) “There are times when the need to urgently admit and provide specialised care for a patient can override the need for complete segregation of sexes” (section 3) Carried over, near verbatim
Exempt settings A decision matrix of “Justified breaches” by area of care (Annex A) Lists of settings and scenarios where the guidance “does not apply” (section 3) Restructured
Children Children and young people “should have the choice of whether care is segregated according to age or gender” (Annex A) The guidance “does not apply to children’s areas as most services for children are not separated by sex”, unless a reasonable request is made (section 3, FAQ 3) Changed; new stated rationale
“Rare” “On the rare occasion that mixing does occur” (section 1.3, all mixing) “In these rare circumstances” (section 4, trans patients’ clinical exceptions) Word carried over; applied to a new situation
Four-hour threshold Critical care levels 2 and 3: transfer “within four hours of being ready to be moved” after a step-down decision; assessment and observation units: four hours after a decision to admit; breaches “not counted between the hours of 10.00pm and 7.00am” (Annex A; Annex C, FAQs 1–4) Adult critical care levels 2 and 3 listed where the guidance “does not apply”; four hours after a decision to discharge or transfer in enhanced care (level 1) and in units where patients are assessed, treated or observed (section 3). FAQ 1: “The only instances when a time limit applies” Four-hour threshold retained, but the settings and triggers changed; the overnight qualification is not reproduced
Nil returns and whole-bay counting Annex C, FAQs 9 and 11 FAQs 4 and 5 Retained in substance
Financial sanctions A paragraph on contract sanctions (section 1.8) Not reproduced This comparison does not establish whether contractual or other enforcement arrangements changed

Two things follow. First, several of the 2026 guidance’s operational propositions appeared in 2019, also without a cited empirical basis. Inheritance neither validates nor invalidates them. Second, the 2026 guidance does not reproduce the 2019 guidance’s specific procedures for trans and non-binary patients. It supplies general decision principles in their place, and its references to the code bring in the code’s own guidance on asking about sex (section 5 below). The practical steps for these situations are less explicit than they were.

4. What the guidance cites for its factual propositions

The guidance cites no studies, empirical datasets or evidence syntheses. This was checked in the retained text and in the list of links captured from the same page. That list contains 17 links, including three to the statistics and reporting page. No study, dataset or evidence synthesis is identified there as empirical support for the factual propositions assessed in this note. The linked pages were not themselves searched for supporting literature. Its covering letter asks boards to make sure local decisions are “lawful, proportionate, evidence-based and clearly documented”. The guidance itself does not provide or link to an empirical evidence base from which local teams could assess its propositions. That is a limitation in citation transparency. It is not a finding that the propositions are unsupported, or that the policy is unjustified.

The propositions are of different kinds, and need different tests.

Proposition Kind of claim Cited basis in 2026 Earlier source What can be concluded from these documents
Clinical-need exceptions for trans patients will be rare (“these rare circumstances”) Frequency None “Rare” used in 2019 of all mixing, not of this Unquantified. No denominator, such as trans patients to whom the rule applies, and no frequency data are given
Single rooms serve “privacy, dignity and safety for all patients” Several outcomes: privacy (environmental); dignity (partly patient-reported, partly normative); safety (multiple physical, psychological, sexual and patient-reported outcomes) None 2019 used side rooms to protect privacy Each outcome needs its own outcome- and setting-specific evaluation; safety cannot be inferred from privacy. As an example of the research that exists, a 2023 systematic review including 145 relevant publications on acute admissions reported “No clearly consistent conclusions could be drawn about overall benefits of single rooms”. Patients who preferred single rooms “tended to do so for privacy”, while “some groups were more likely to prefer shared accommodation to avoid loneliness”. It is not a policy-specific estimate for trans inpatients or mental health wards, and this note does not appraise it
Urgent admission or specialised care “can override the need for complete segregation of sexes” Operational and clinical judgement None 2019, near verbatim Inherited policy judgement. The exempt settings are not one clinical class; each would need assessing separately
“most services for children are not separated by sex” Prevalence None 2019 gave a different rationale (children’s choice) Within the guidance’s English NHS context, “services” is not defined as a counting unit, and no denominator or supporting prevalence data are given
Stakeholder engagement showed “consistent support” for privacy, dignity and safety for all Process claim Not published or linked from the guidance or its publication page — Not independently assessable from the material cited. It establishes NHS England’s description of its engagement, not the degree or representativeness of agreement. It concerns a general principle, not the biological-sex rule

None of this shows the propositions are false. Some may well be true. The finding is that the guidance gives no empirical citation for them, and that some appeared in 2019 with none either.

5. What the guidance leaves unspecified

How a patient’s biological sex is established. The 2019 guidance specified how to decide placement using presentation and preferences; it did not set out a process for establishing biological sex, because its rule did not turn on it. The replacement does not reproduce those instructions, and does not provide a comparably specific process for establishing the sex category used by its new default (section 3). The code supplies general guidance on proportionate enquiries and local procedures:

The code also sets out limits:

The unresolved question is how providers should translate these principles into admission decisions, particularly where information is uncertain or the patient cannot respond. The 2026 guidance does not address patients who are unconscious or lack capacity. The 2019 guidance did. The guidance asks teams to make sure staff know local processes “so decisions are made without unnecessary delay”. It does not address uncertainty about a patient’s sex specifically. This note makes no claim that such uncertainty has delayed care.

The trans patient’s own safety. The guidance’s general safety duties encompass trans patients. It does not specify how staff should assess and mitigate risks arising for a trans patient in a biological-sex placement, beyond its general assessment principles, single-room offer and clinical exception. The code itself recognises, in an example about toilets, that requiring trans people to use facilities for their biological sex “may cause safety risks and distress for trans users” (para 13.123). Single-room accommodation brings its own competing considerations, such as observation, isolation and therapeutic interaction. These are domains for assessment, not demonstrated effects of this policy. Trans status alone does not establish that an individual poses a risk to others; assessment should consider the relevant circumstances of all patients, as the HSSIB report also records (para 4.2.11, below). Trans patients do not share a single set of risks or preferences.

HSSIB recommendation R/2024/041. HSSIB’s investigation report Mental health inpatient settings: Creating conditions for the delivery of safe and therapeutic care to adults was published on 24 October 2024. Its recommendation R/2024/041 reads:

“HSSIB recommends that NHS England, working with relevant stakeholders, develops guiding principles for providers of mental health inpatient care to support local decision making when accommodating patients, including patients who are transgender and non-binary. This is to ensure a provider’s equality and human rights obligations are considered, and all patients are cared for in environments where they feel safe and that are therapeutic.”

HSSIB’s recommendations log records NHS England’s response: it would revise the same-sex accommodation guidance, and “It is believed that this will meet the expectations of HSSIB’s safety recommendation”. The log currently displays a recommendation date of 11 March 2026 and a response received on 30 May 2025. That appears to be a metadata discrepancy, and should not be taken as the recommendation’s original issue date.

The report gives context. It found that “Approaches to accommodating patients who were transgender and non-binary varied in mental health inpatient settings”. It records that it was told any guiding principles “should consider the risk assessment of all patients, rather than assuming that a patient who is transgender and non-binary would pose an inherently greater risk to others compared to other patients” (para 4.2.11). It also records that the investigation “did not identify specific incidents through its evidence collection where a patient who was transgender and non-binary had harmed another patient”. That is a finding about one investigation’s evidence collection. It is not an estimate of incidence, or evidence that risk is absent. The report was written under the 2019 guidance and before For Women Scotland. It does not estimate the comparative effects of the 2026 policy.

The revised guidance addresses the recommendation through general decision principles: three core questions, and four themes covering skills, environment, communication and record keeping, and measurement. It refers to human rights and the Equality Act, and applies to mental health units. It does not expressly name non-binary patients. It does not set out a distinct framework for assessing therapeutic mental health environments. Some of the populations and aims the recommendation names are therefore not expressly developed. This note has not assessed implementation, or established whether HSSIB regards R/2024/041 as fulfilled.

What “clinically appropriate” means. The guidance does not define when a birth-sex placement “would not be clinically appropriate”. Safeguarding and clinical risk are expressly part of its general decision framework: “Safeguarding patients from the risk of harm, abuse and neglect is an integral part of high-quality care”, and teams should “identify any safeguarding issues” (section 2). The guidance does not separately define how those considerations, including psychological safety, risk of assault and trauma, determine a departure from the placement default, or who makes that assessment. It requires teams to “review the patient placement regularly”, and specifies no interval or event-triggered reassessment. The covering letter asks boards to ensure that “arrangements are in place to support consistent decision-making and escalate difficult issues when needed”, and that staff “know where to seek advice on complex cases”. Neither document specifies a detailed pathway, decision authority or timescale for disputed individual placements. Consent, capacity and advocacy are not addressed beyond the general principle of partnership with the patient. National guidance may properly leave such detail to providers. The point is that the guidance does not say which detail it leaves to them.

Non-binary patients and variations of sex development. The guidance does not expressly discuss non-binary patients, some of whom may have the protected characteristic of gender reassignment (Equality Act 2010, s.7). It does not discuss circumstances in which variations of sex development create uncertainty, or particular privacy and care needs. These are distinct matters: one concerns gender, the other sex characteristics, and variations of sex development are themselves varied. General provisions may still apply, but their application is not illustrated.

A timetable. The covering letter asks boards to review the guidance “at pace”, without a deadline.

The reporting guidance. The guidance says “Related reporting guidance has also been updated”. The main-content link list captured at 02:39 UTC on 17 October 2026 shows three “reporting guidance” links, all to NHS England’s mixed-sex accommodation statistics page. At 02:44 UTC on 17 October 2026, and again at 03:48 UTC immediately before publication, that page was unchanged from its 23:44 UTC capture the previous evening (same text hash). It still referred to the September 2019 policy, saying “Reporting from January 2020 data should reflect these updates”, and offered Mixed-sex accommodation guidance v1.5.

That file was retrieved and read in full for this version of the note. Its front page says “Updated: October 2019”. Its version history describes version 1.5 as “Changed to reflect the updated policy guidance” published in September 2019. It directs readers to “Delivering Same-Sex Accommodation, September 2019”, including that policy’s decision matrix on “whether it is clinically justified or not” and its “further information regarding trans patients and gender variant children (annex B)”. The return “collects monthly data on all unjustified occurrences of patients receiving care that are in breach of the sleeping accommodation guidelines”. “Justified occurrences of MSA” are outside the scope of the national return. The file’s upload path includes May 2025; the date the document itself states is October 2019.

The 2026 guidance does not use the words “justified” or “unjustified”. It says “All breaches of same-sex hospital accommodation must be reported through the Strategic Data Collection System (SDCS)”. So the collection guidance at the linked page is built on the policy the 2026 guidance replaces, and its stated scope differs from the 2026 reporting instruction. This is a difference in the documents’ stated terms. It does not by itself establish how the national reporting population changes: some circumstances previously described as justified mixing may instead fall outside the revised guidance, for example in the settings where it “does not apply”. That mapping, and any instructions issued through SDCS, require clarification. On one point the two documents align: the collection guidance places bathroom and toilet mixing outside the national return, and the 2026 guidance lists “all toilet and bathroom breaches” under local reporting. This note has not established which other categories enter the national return under the 2026 guidance.

The statistics page’s own description is consistent with the 2019 framework: “NHS organisations submit data on the number of occurrences of unjustified mixing in relation to sleeping accommodation”. It also links to a Mixed-Sex Accommodation (MSA) DCB page on NHS England Digital, which may describe the data collection. That page presented an automated browser check and could not be read, so it was not inspected. This note does not establish that no updated specification has been issued by that or any other route, including the data collection system itself. Publication lag is one possible explanation.

Update, 20 October 2026. We reported this to NHS England’s statistics team on 17 October 2026 (ET-078). On 19 October the team replied that the page would be updated, and by 20 October it was. The page now offers Monthly Mixed-Sex Accommodation Return Guidance version 1.6 (“Updated: October 2026”). Its version history says it was “Changed to reflect the updated policy guidance” published in October 2026, and lists among the key changes the “removal of the ‘unjustified’ and ‘justified’ breach terminology”. The return now “collects monthly data on all occurrences of patients receiving care that are in breach of” the 2026 guidance, and reporting should reflect it “from October 2026 data onwards”. Only sleeping-accommodation breaches are reported nationally; bathroom and toilet mixing is monitored locally. The 2019 guidance and the 2019 policy reference have been removed from the page. The page’s introduction still describes the data as “occurrences of unjustified mixing”. The passage above records the page as it stood when this note was published, and is not changed.

What this note does and does not establish

It establishes that:

It does not establish:

Sources

All sources are retained. Times are UTC. “Text SHA-256” is the hash of the page’s main-content text, extracted in a browser (the innerText of the <main> element) and encoded as UTF-8. “File SHA-256” is the hash of the downloaded file’s bytes. The manifest accompanying this note lists each retained file.

Limits of the text captures. A main-content text capture omits the page header, navigation and footer, image content and link destinations, and does not preserve formatting such as emphasis or table layout. To cover link destinations, the list of links inside the main element was also captured for sources 1 and 2, with its own hash. Source 1’s list has 17 links (captured 02:39 UTC, 17 October 2026; SHA-256 eec1d6b5f278de88435b6b87012ae0958b8f410e224d1c78e94c5016c78c19bb). They go to the statistics and reporting page (three links), the NHS Constitution, an Intensive Care Society standards document (two links), legislation.gov.uk, the EHRC code, the page’s own section anchors and NHS England publication indexes. None is cited as empirical support for the factual propositions assessed in this note.

  1. NHS England. Privacy, dignity and safety in hospital accommodation. Publication reference PRN02528i. 15 October 2026. https://www.england.nhs.uk/long-read/privacy-dignity-and-safety-in-hospital-accommodation/ — First read 16 October 2026; text re-captured 23:41, 16 October 2026, unchanged. 21,339 characters; text SHA-256 06bbbd0c1ed611fa210a9f56979a86f9463f9c40b845ee548dd7bd9518555e83.
  2. NHS England. Privacy, dignity and safety in hospital accommodation (publication page). https://www.england.nhs.uk/publication/privacy-dignity-and-safety-in-hospital-accommodation/ — First read 16 October 2026. Text captured 02:41, 17 October 2026. 1,023 characters; text SHA-256 a9b4083533f588ffcbcf9f96e7cfec77aadefa815d17a7995110021a335f19af. Link list (7 links) SHA-256 08dbe89c62d8d5d7544ae4479cd0bf0218485a6a604145c75cdc192598453621. Shows “Document first published: 14 September 2019” and “Page updated: 16 October 2026”. Lists the guidance and the covering letter, each “Published 15 October 2026”, and refers to a separate publication, Guidance on NHS staff facilities, which this note did not examine.
  3. Mortimer D, Burton D. Guidance to support NHS organisations in the provision of single-sex services and facilities. Letter to trust and ICB chief executives. NHS England; 15 October 2026 (updated 16 October 2026). https://www.england.nhs.uk/long-read/guidance-to-support-nhs-organisations-in-the-provision-of-single-sex-services-and-facilities/ — Text captured 23:43, 16 October 2026. 5,178 characters; text SHA-256 37b778b06216f9bf521eac77992b0f1b5e72647a9ef0e98201a1db270d5a9a54.
  4. NHS England. Delivering same-sex accommodation. Publishing approval reference 000233. 14 September 2019; last updated 24 April 2025. Internet Archive copy captured 8 January 2026: https://web.archive.org/web/20260108233806/https://www.england.nhs.uk/long-read/delivering-same-sex-accommodation/ — Read in full; text captured and saved by 23:48, 16 October 2026. 30,488 characters; text SHA-256 b78b9133c2a1552dd197c7051c99317541a26b3da6d59eac140e1aa881f465b6. The original address now redirects to source 1.
  5. Equality Act 2010, section 7; Schedule 3, paragraphs 26–28; Schedule 23, paragraph 3. legislation.gov.uk (current revised text) — Files retrieved 23:48, 16 October 2026. File SHA-256 (XML): s.7 26b7c2f76ba7a355ca44947e4e1a884abc05a38aa698e5705a3cdbe94c881456; Sch 3 c1e05a27d4ac63a484eea90d0bda7b6cf6b7d52dcb41eb2014856c534b6c8021; Sch 23 da55aa2c4cf75ae115f58326c2d7e6638a3e9eff952f653944367148e7cf1b1f.
  6. For Women Scotland Ltd v The Scottish Ministers [2025] UKSC 16 (16 April 2025). https://supremecourt.uk/cases/uksc-2024-0042 — Judgment PDF retrieved 22:59, 16 October 2026, and read in full. File SHA-256 4f28da41cc23c84ef94252ffa4fd486fa69bf75fa83ab40f0c65ecdef31e1224. Paragraphs used: 215, 264–265.
  7. Equality and Human Rights Commission. Equality Act 2010: Code of Practice for services, public functions and associations, 2026. ISBN 978-1-5286-6395-3. In force 5 August 2026. https://www.gov.uk/government/publications/equality-act-2010-code-of-practice-for-services-public-functions-and-associations-2026 — PDF (342 pages) retrieved 22:58, 16 October 2026, and read in full. File SHA-256 858859ba4a3b6e600b45e04be358c81cbf8ea186f65774a24ee0cfba6f581992. Publication page retrieved 23:34, 16 October 2026. Paragraphs used: 1.6, 2.49, 13.106, 13.115, 13.123, 13.130, 13.144, 13.148, 13.159, 13.162, 13.165, 13.168, 13.173–13.174, 13.179, 13.181–13.182.
  8. Gender Recognition Act 2004, section 22. legislation.gov.uk — File retrieved 23:48, 16 October 2026. File SHA-256 (XML) 9dfaf50c9cdc04f4c31b791aba1860cf1bb61667bed05bf53bac3458a32ecbe2.
  9. Information Commissioner’s Office. What is special category data? https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/lawful-basis/special-category-data/what-is-special-category-data/ — Retrieved 23:48, 16 October 2026. File SHA-256 eeb506608b6374ead114497cde401368fd282ce2b045a526e58ccbbf4bfa494f. The version checked showed a “Latest update” of 9 April 2024 and a notice that the guidance is under review following the Data (Use and Access) Act. Read: the page itself only.
  10. Department of Health and Social Care. The NHS Constitution for England. Last updated 17 August 2023. https://www.gov.uk/government/publications/the-nhs-constitution-for-england/the-nhs-constitution-for-england — Retrieved 23:27, 16 October 2026. File SHA-256 9fed9320fd34812c88c858bd38c0a82ef13e5c933a8464d9d758b25767bc6823.
  11. Health Services Safety Investigations Body. Mental health inpatient settings: Creating conditions for the delivery of safe and therapeutic care to adults. Investigation report, published 24 October 2024. https://www.hssib.org.uk/patient-safety-investigations/mental-health-inpatient-settings/investigation-report/ — Retrieved 23:48, 16 October 2026. File SHA-256 b642986ac2efc6561d656af94bb33925a7f54e7b3da5150d2ba193644736b106. Read: executive summary findings; section 4.2.5–4.2.12; recommendation R/2024/041.
  12. Health Services Safety Investigations Body. Safety recommendations log: Mental health inpatient settings (R/2024/041). https://www.hssib.org.uk/safety-recommendations-log/mental-health-inpatient-settings-5/ — Retrieved 23:26, 16 October 2026. File SHA-256 19e2944b9ae9032c81a387631d225f3ae485ae574a948036ff05c509043bbfc6.
  13. NHS England. Mixed-sex accommodation (statistics). https://www.england.nhs.uk/statistics/statistical-work-areas/mixed-sex-accommodation/ — Text captured 23:44, 16 October 2026. 4,149 characters; text SHA-256 77e6d87a79ef194a1d13c3f409a512c609de90b52302d25c7ec4d8dd40eebd2f. Re-checked 02:44 and 03:48, 17 October 2026: text hash unchanged. Linked file NHS England, Monthly Mixed-Sex Accommodation Return: Collection Guidance, version 1.5, “Updated: October 2019” (MSA-Guidance-v1.5.pdf, https://www.england.nhs.uk/statistics/wp-content/uploads/sites/2/2025/05/MSA-Guidance-v1.5.pdf): 173,979 bytes; file SHA-256 138cf261eb1ab21757fad2db8a627080dc4c1503681c9cb0eb283b14f69cac21. Retrieved 17 October 2026 and read in full (file hash re-checked unchanged at 03:48): unnumbered cover plus six numbered pages (seven PDF pages). The statistics page also links to a breach rate indicator methodology (June 2025) and an NHS England Digital collection page; neither was examined, and the latter could not be read.
  14. Bertuzzi A, Martin A, Clarke N, Springate C, Ashton R, Smith W, Orlowski A, McPherson D. Clinical, humanistic and economic outcomes, including experiencing of patient safety events, associated with admitting patients to single rooms compared with shared accommodation for acute hospital admissions: a systematic review and narrative synthesis. BMJ Open. 2023;13(5):e068932. doi:10.1136/bmjopen-2022-068932 — Full text retrieved from Europe PMC (PMC10163491), 23:27, 16 October 2026. Cited only for its stated conclusions, and not appraised.

Declarations

Competing interests

Position. The author is a transgender woman receiving gender-affirming hormone therapy and a dermatologist, with a personal stake in transgender health and the commitments set out below, and treats these as potential sources of motivated reasoning. A plausible risk is preferential detection or weighting of congenial findings, but the direction and magnitude of any actual bias cannot be known in advance, and over-correction is as possible as confirmation. The safeguards are the methods described here and the audit materials made available with the final note, not the disclosure. Nothing in this paper rests on the author’s clinical standing; every judgement is published with its reasoning, for anyone to check.

Declared prior (an intellectual interest, declared as a competing interest). “Eden is a transgender woman receiving gender-affirming hormone therapy, and a dermatologist. She holds a declared prior in favour of access to gender-affirming hormones for adults, and of adolescent access to puberty blockers and gender-affirming hormones; the method is designed to make any resulting bias more visible and auditable, and findings that cut against that position are reported at full weight.”

Competing interests (as at 17 October 2026; any change is declared as an Update in this paper’s revision history. The definitive, dated list is kept at edenopenly.com/about/declared-interests).

(a) The author is the founder and sole funder of a non-profit transgender healthcare and education organisation. The author is developing its clinical services, including its clinical protocols, and its education programmes, and is recruiting its clinical staff. Its education programmes include patient and family resources, school resources, and training for healthcare professionals in the organisation’s own standards of care, which address questions in the same field as the guidelines and standards of care this series appraises. The organisation is not a party to this paper and has no role in it. The findings of this paper may inform its clinical protocols and educational material; that is a further interest in the findings, declared here.

(b) The author is the founder and sole funder of Eden Institute (edeninstitute.kr), a transgender health research institute in South Korea, which is intended to include a biobank and associated data infrastructure. It provides no funding for this paper and has no role in it.

(c) The author, through Eden Openly, is engaged in public correspondence and requests concerning the NHS Wales Joint Commissioning Committee’s Welsh Gender Service surgical referral pause, including written approaches to the Committee, requests under the Freedom of Information Act 2000, correspondence with Llais, and submissions to Senedd committees. Eden Openly publishes critical analysis of the decision at edenopenly.com/welsh-gender-service and describes itself as a party to the matter; the correspondence is published at edenopenly.com/wgs-correspondence. This is a public position on the evidence base for gender services. The author is not a party to any litigation and has no present intention to become one; any change is declared as an Update.

(d) The author, through Eden Openly, is engaged in parliamentary advocacy on the Health Bill’s single patient record provisions: written evidence to the House of Commons Public Bill Committee (published on the parliamentary record as HB130), a submission to the House of Lords Delegated Powers and Regulatory Reform Committee, and briefings to members of the House of Lords proposing an amendment. The advocacy concerns the confidentiality of, and access to, patient records, including a competent young person’s confidential control of their own record. It argues against provisions drafted by the Department of Health and Social Care and engages NHS England’s conduct. Everything filed is published at edenopenly.com/single-patient-record. This is a public position taken before Parliament; it is continuing, and any change is declared as an Update.

(e) The author, through Eden Openly, is conducting a structured appraisal of the Cass Review and the associated University of York systematic reviews. Its methods, stage and record are published at edenopenly.com/cass-review. This paper does not discuss the Cass Review or the University of York systematic reviews, and none of its sources is among the objects of that appraisal.

(f) The author’s published evidence reviews at Eden Openly assign quality and certainty grades to evidence that may overlap the subject of this paper. Where they do, they are a prior commitment on the same evidence, stated study by study, and are declared here as an interest. None of the author’s published reviews overlaps the evidence in this paper.

(g) The author, through Eden Openly, reports errors in published literature to the journals and bodies responsible for them, and records each report and its outcome in the Evidence Transmission Register, published at edenopenly.com/editorial/transmission-register. Reports concerning sources examined in this paper: none at publication.

(h) The author is a co-owner of, and the lead researcher at, a commercial business that develops skincare products and sells them to the general public through ordinary retail channels. The author is also planning, as a joint venture with a surgeon, a general aesthetic dermatology and surgery hospital; it is not open, may not open, and would not target transgender patients. The author may receive a financial return from both. Neither is a party to this paper, provides funding for it or has a role in it. These are the only commercial interests declared here.

The declared prior and interests (a) and (b) create a plausible incentive toward findings unfavourable to a policy that places trans patients by biological sex, and each is disclosed for that reason. (c) and (d) are public positions on gender-service policy and patient-record policy, and on NHS England’s conduct; they may bear on this paper because its subject is an NHS England document. No direct source overlap with (e) or (f) has been identified by the author; these activities are disclosed so readers can assess their relevance. (g) is disclosed as a prior commitment, not an incentive of stated direction. (h) bears only where a paper concerns skin, hair or aesthetic treatment.

Memberships. The author holds no membership of WPATH, EPATH, ASIAPATH or any professional body whose guidance Eden Openly appraises. Our full position is set out in our statement of independence.

Symmetric standard. Interests are disclosed in these declarations. This note reaches conclusions the author did not want, including:

It was revised after five rounds of adversarial review conducted with AI assistance, the last of which audited the retained-source package and the claim register. That process was not peer review, and this note is not peer reviewed. No lawyer has reviewed it.

Ethics

This note analyses published documents. It involves no new data and no participants, and ethical approval was not required.

Funding

This paper is unfunded. The author accepts no third-party funding for research, publication or appraisal activity, as a standing policy, and neither does (a) nor (b). All costs, including any external review, are paid personally by the author. The author’s funding of (a) and (b) is a financial interest in organisations working in transgender health, whose operating environment the subject of this paper may affect. (h) is a commercial interest, present and planned, from which the author may receive a financial return.

Data availability

Source identifiers, access times and file or text hashes are listed under Sources, with the basis of each hash stated. Retained copies of all 14 sources are held in Eden Openly’s source archive. They are third-party documents, so they are not redistributed, but the source manifest’s hashes let a reader check any copy obtained from the original publisher. This note, including its correction record, is deposited under the version DOI given in the evidence summary, with three audit files: the claim register (each material statement with its source, location, type and verification status, and the absence searches), the per-string quotation check, and the source manifest (each retained file, the basis of its hash and its SHA-256). The same files are published on the note’s page at edenopenly.com. The source manuscript and the build script are held by Eden Openly and are not deposited; the PDF’s integrity note gives the SHA-256 of the manuscript it was built from (Correction 32). The concept DOI, which identifies all versions, is given on the deposit record rather than in this file.

Author contributions

Eden: conceptualisation, methodology, investigation, writing (with AI assistance, as described under Preparation), review and editing, and project administration.

Acknowledgements

Before deposit, the note was read in full by the author and by one external human reviewer, who is confidential and is not named. The adversarial reviews described under Competing interests were conducted with AI assistance. Neither was peer review.

Preparation

This note was prepared with the assistance of a large language model (Claude, Anthropic), used for source retrieval, source capture and hashing, structural editing and adversarial review. AI assistance is not authorship, peer review or author approval. The author is responsible for every claim, every quotation and every citation. The claim-to-source checks described here were carried out with the language model’s assistance and have not been independently repeated by a human. Quoted strings were checked by script against the retained sources, after normalising whitespace and quotation marks. The per-string results file lists, for each string, the source attributed in the note, the retained sources in which it was found, and, for strings not from any source (earlier-draft wording, column labels, the house phrase), the reason. String presence does not establish correct attribution or use in context; an all-source match did not catch the “necessary for everybody” attribution corrected in v0.6 (Correction 27).

Verification

Of 14 sources, 14 were obtained and are held as retained copies; none was read in published abstract only or in an official extract, translation or summary, and none was cited unobtained. Source 2 was first read on 16 October 2026 but captured only at 02:41 UTC on 17 October 2026, after v0.3. For source 5 the retained copies are of the provisions cited, not the whole Act. Sources 5, 9, 11 and 13 were read only in the parts stated against each; the file linked from source 13 was read in full. Source 14 is cited only for its stated conclusions. Each material statement is recorded in the claim register with its source, location, type and verification status. A numeric check of the register does not detect a reference inserted mid-list.

Correspondence

No correspondence was sent before publication. Publication was not held for any reply. If the reporting-guidance point is raised with NHS England, the report and its outcome will be recorded in the Evidence Transmission Register and in this note’s revision history.

Method and limitations

This is a narrative note, not a systematic review. It has not been peer reviewed (it was revised following adversarial review conducted with AI assistance), and no lawyer has reviewed it. It does not follow PRISMA, no formal risk-of-bias instrument was applied, and it assigns no certainty grades. It is a descriptive note, not an outcome-grading review. It compares documents; it does not appraise the research evidence on hospital accommodation, and it does not examine contracts, technical reporting instructions beyond the publicly linked collection guidance, local policies or implementation. It is not legal advice and not a policy position, and it must not be used as the basis for a placement decision about any individual patient. Because the method is not a systematic search, the note reports what the documents it read contain and does not assert that no other source exists.

This note grew out of a draft Guidance Appraisal. That draft was not taken into the EO Verdict Series, because the document had been read in full before anything could be frozen, as GAP v0.6 Part A, A6 requires. The guidance may be appraised in the series later, from a clean start.

Evidence identification — method and its limits

The sources were identified by starting from the guidance and its covering letter, following the documents they cite or link to, and adding the legislation, judgment, statutory code, predecessor guidance and HSSIB material needed to interpret them. No systematic search was run. The 2023 systematic review on single rooms is cited as an example of the research that exists, not as the result of a search, and is not appraised. Each absence statement in the note is limited to the documents named and to the searches recorded in the claim register: for example, that the retained text of the 2026 guidance contains no match for “non-binary”.

Correction record — thirty-two entries

On the direction of corrections: the Direction column gives the direction in which each correction moved the note. These labels are the author’s judgments, not measurements. Corrections 1, 2, 3, 6, 7, 8, 12, 13, 14, 21, 22, 26 and 28 moved it towards the guidance. Of those, the errors corrected by entries 3, 6, 7, 8, 12, 13, 14, 21, 22, 26 and 28 had run in this project’s tracked drift direction, against the guidance. Entry 15 also removed an overstatement in the tracked drift direction, though not one directed at the guidance. Entry 5 was mixed. Entries 4, 9, 10, 11, 16, 17, 18, 19, 20, 23, 24, 25, 27, 29, 30, 31 and 32 were neutral.

# Label What changed Direction
1 Correction A candidate finding was withdrawn before drafting: that the guidance links to a draft EHRC code. The GOV.UK address contains “draft”, but the code is in force and the publication page records it is no longer in draft. Towards the guidance
2 Correction A description of how the 2019 guidance placed trans patients, used informally before the 2019 text had been obtained, was kept out of v0.1. The text was obtained for v0.2 and is quoted directly. Towards the guidance
3 Correction v0.1 said For Women Scotland “did not address hospital accommodation”. It named “female-only hospital wards” among its examples (para 215). The error came from an absence check whose search output was cut short. Found by the first adversarial review. Towards the guidance (the error had run against it)
4 Correction v0.1 did not examine the communal accommodation exception, the code’s statement of its own status, or the Constitution’s statement that pledges are not legally binding. Added in v0.2. Found by the first adversarial review. Neutral
5 Correction v0.1 presented the rule as “a legal claim”, said “the legal chain holds”, and called the paraphrase of the code “accurate in substance” and the framing difference “not an error”. Reframed in v0.2. Found by the first adversarial review. Mixed
6 Correction v0.2 said proportionality must be satisfied “before the biological-sex rule applies”, that the guidance “moves proportionality into case-by-case exceptions”, and that “the first two are law”. The meaning of sex and the justification for sex-restricted provision are distinct. This note has not established where proportionality is assessed. The code does not itself impose legal obligations, but relevant provisions must be considered in proceedings under the Act. [Wording amended in v0.4; v0.3 said “The code is not law”.] Corrected in v0.3, and Equality Act 2010 Schedules 3 and 23 added as primary sources. Found by the second adversarial review. Towards the guidance (overstatement against it removed)
7 Correction v0.2 gave a met / partly met / not met verdict on the HSSIB recommendation, partly by searching for words. Replaced with a bounded statement of explicit textual coverage. The recommendation’s reference (R/2024/041), parent report and date added, with context. Found by the second adversarial review. Towards the guidance (overstatement against it removed); the added context runs both ways
8 Correction v0.2 said the guidance removed the 2019 provisions “without replacing them”, and called the single-room purpose “changed”. Narrowed to: specific procedures not reproduced, general principles supplied; rationale broadened. Found by the second adversarial review. Towards the guidance
9 Correction v0.2 described a 2023 review as covering “145 studies”. It included 145 relevant publications. Its title was misquoted. Corrected. v0.2 inferred a document date from an upload path; v0.3 reports the path, the embedded file dates and the server date, and states the content was not read. Found by the second adversarial review. Neutral
10 Correction v0.2’s declarations said every source carried a hash, that the claim map was published, and that interests were declared before the findings. None was accurate as stated. Corrected; hash bases specified; NHS sources retained as verified text copies. Found by the second adversarial review. Neutral
11 Update v0.3 adds the code’s positive guidance on enquiries; the ICO’s position on special category data; the boundaries of Gender Recognition Act s.22; reporting mechanics with the reporting/unlawfulness distinction; and the national, provider and bedside levels. Added after the second adversarial review. Neutral
12 Correction v0.3 said the guidance “attributes to the code a sentence the code does not contain”. That wording implied misattribution. Replaced: the guidance paraphrases the code, and the paraphrase does not itself state the statutory conditions or proportionality requirements. Found by the third adversarial review. Towards the guidance (the error had run against it)
13 Correction v0.3’s symmetric-standard list said the guidance “does not claim a safety benefit it could not show”. That implied a benefit could not be shown, which this note does not establish. Replaced: it does not explicitly claim a demonstrated comparative safety benefit for the placement default. Found by the third adversarial review. Towards the guidance (the error had run against it)
14 Correction v0.3’s headline said the guidance’s explicit coverage of the HSSIB recommendation “is limited”. Replaced: it addresses the recommendation through general principles; some requested populations and aims are not expressly developed. Found by the third adversarial review. Towards the guidance (the error had run against it)
15 Correction v0.3 said “No individual’s trans status implies risk to others”, a categorical claim beyond the sources. Replaced: trans status alone does not establish that an individual poses a risk to others; assessment should consider the relevant circumstances of all patients. Found by the third adversarial review. Neutral (overstatement in the tracked drift direction removed)
16 Correction v0.3 said the children’s prevalence claim was unassessable because its “geographical scope” was unspecified. The guidance’s English NHS context supplies that. Narrowed to the undefined counting unit and the absent denominator and data. Entry 6’s wording on the code’s status also amended. Found by the third adversarial review. Neutral
17 Correction v0.3 said 13 of 14 sources were retained and described source 2 as listing “the guidance and the covering letter only”. Source 2 has now been captured with a hash. The capture also refers to a separate publication, Guidance on NHS staff facilities; whether the page changed between the first reading and the capture is not known. The data availability statement now names the separate audit files. Found by the third adversarial review. Neutral
18 Update v0.3 based the reporting-link finding on file metadata, without reading the file. v0.4 reads the linked collection guidance in full and states the finding on its content: it is the October 2019 version, built on the 2019 policy and limited to unjustified sleeping-accommodation breaches. The limit is kept: this does not establish that no updated specification exists elsewhere. Prompted by the third adversarial review. Neutral as a change of method; the finding it supports is unfavourable to the guidance’s statement that reporting guidance has been updated
19 Update v0.4 restates the reporting summary so that it does not imply every alternative arrangement is a breach; adds a statement of the limits of the text captures and records the captured link lists; records the version of the ICO page checked; and restates the safeguards as the methods and the audit materials. Prompted by the third adversarial review. Neutral
20 Correction v0.4’s scope, reporting bullet and method statement said the note did not examine technical reporting specifications, while section 5 analysed the publicly linked collection guidance. Made consistent: the note examines that public document, and has not inspected current SDCS instructions or any specification distributed another way. The statistics page’s link to an NHS England Digital collection page, which could not be read, is now recorded. Found by the fourth adversarial review. Neutral
21 Correction v0.4 compared the collection guidance’s “unjustified occurrences” with the 2026 “All breaches” without qualification. Qualified: this is a difference in stated terms, and does not by itself establish a change in the national reporting population, because some previously justified mixing may fall outside the revised guidance. Found by the fourth adversarial review. Towards the guidance (the overstatement had run against it)
22 Correction v0.4 said none of the 2026 guidance’s 17 links “goes to a study, dataset or evidence synthesis”, although three go to the statistics page. Replaced: no linked item is identified as empirical support for the propositions assessed. Found by the fourth adversarial review. Towards the guidance (the overstatement had run against it)
23 Correction v0.4 kept broader wording (“attaches no clinical or safety finding”; “does not present the rule as a safety finding”) beside the narrower corrected sentence. Narrowed throughout to the absence of an explicit claim of demonstrated comparative safety benefit. Found by the fourth adversarial review. Neutral
24 Correction Pagination of the collection guidance corrected (cover plus six numbered pages); v0.3’s revision-history entry corrected to record 13 of 14 sources retained; data availability states how the audit files travel with the review copy. Found by the fourth adversarial review. Neutral
25 Correction v0.5’s comparison table said the four-hour rule was “Carried over”. The threshold persists, but its settings and triggers changed (2019: critical care step-down and assessment units, with an overnight qualification; 2026: enhanced care level 1 and assessment units, after a discharge or transfer decision, with critical care levels 2 and 3 now outside the guidance). Split into two rows. Found by the fifth adversarial review. Neutral
26 Correction v0.5 summarised national reporting without the 2026 guidance’s separate local-reporting list, which could imply that every breach category enters the national return. Local-reporting context added, including the point on which the 2026 guidance and the old collection guidance align. Found by the fifth adversarial review. Towards the guidance (the omission had run against it)
27 Correction v0.5 introduced the code’s wording as a quotation by the guidance. The displayed wording is the code’s; NHS England’s sentence introduces the principle in its own words. Attribution corrected. The all-source string match had not caught this. Found by the fifth adversarial review. Neutral
28 Correction v0.5 said the guidance specifies “no escalation process for disputed placements” and did not say whether clinical appropriateness includes “safeguarding”. The covering letter requires escalation arrangements, and the guidance makes safeguarding part of its general framework. Narrowed to the absence of a detailed pathway, decision authority or timescale, and of a definition of how those considerations determine a departure. Found by the fifth adversarial review. Towards the guidance (the omission had run against it)
29 Correction v0.5 implied that the 2019 guidance had a procedure for establishing biological sex. It had a placement procedure based on presentation and preferences. Reworded. Found by the fifth adversarial review. Neutral
30 Correction v0.5’s data availability named v0.4 files, and its preparation statement said “every quotation” matched its source. Filenames corrected; the quotation check is described with its exceptions, and a per-string results file added. Found by the fifth adversarial review. Neutral
31 Correction The per-string quotation check published with the interim web version gave wrong line numbers for every quotation after the competing-interests section: the script skipped that section when counting lines. The quotations, their attributed sources and the results were unaffected. The script now counts lines in the manuscript as published, and the deposited file was regenerated against the deposited manuscript and checked row by row against the line it names. Found while preparing the deposit. Neutral
32 Correction The Data availability statement in the deposited PDF of version 1.0, and on this page until the same day, said the source manuscript and the build script were deposited with the note. They are not: Eden Openly does not deposit source files or code. The deposited files are the PDF, the claim register, the quotation check and the source manifest. Corrected on this page on 17 October 2026; the deposited PDF will carry the correction at its next version. Neutral

Licensed CC BY 4.0. The deposited PDF, under the version DOI above, is the version of record; where this page and the PDF differ, the PDF governs.

Revision history

Updated — 20 October 2026. NHS England updated the mixed-sex accommodation statistics page: it now offers collection guidance version 1.6 (October 2026), reflecting the 2026 guidance, in place of the October 2019 version described in section 5. Dated update notes were added to the summary and to section 5; the passages they follow, which describe the page as it stood on 17 October 2026, are unchanged. ET-078 is resolved. Retained copies of version 1.6 (SHA-256 9c7870b91bcb0c7f09fe83e39290bdd495c6de46fef3755ed09f00d976130aa2) and the October 2026 breach rate methodology (SHA-256 278c8f23eca7afec8ccb5e048ee5f56cbb6d215da324f233e7437d58fe69cf9b) have been retained for the source archive. The deposited PDF is not changed; the update will be carried into its next version.

Updated — 19 October 2026. Correspondence: NHS England’s Elective Analysis team replied on 19 October 2026 to the report of the reporting-guidance point in section 5 (ET-078), saying that the mixed-sex accommodation statistics page “will be updated to reflect this change”. When checked at 13:39 UTC that day the page had not yet changed. The reply did not say whether updated collection guidance has already been issued to providers; we have asked. Section 5 describes the page as it stood when checked on 17 October 2026, and the text of the note is unchanged. The other four requests to NHS England are still awaiting a response.

Corrected — 17 October 2026. The Data availability statement no longer says the source manuscript and build script are deposited; they are not (Correction 32). The deposited PDF still carries the earlier wording and will be corrected at its next version.

Updated — 17 October 2026, after deposit. Correspondence: the reporting-guidance point in section 5 was reported to NHS England’s Operational Insights team on 17 October 2026 and is recorded in the Evidence Transmission Register as ET-078. Four further requests to NHS England, each resting on a finding in this note, were sent the same day and are recorded on What we’re asking NHS England. No reply has yet been received. The text of the note is unchanged.

Updated — 17 October 2026. Deposited to Zenodo as version 1.0 (version DOI 10.5281/zenodo.23433543). The declarations were completed to the house presentation standard: Author contributions, Acknowledgements and Evidence identification were added, and the Data availability, Verification and Method and limitations declarations were completed. Correction 31 added. The PDF of record was re-typeset to the house standard, with a cover, abstract and integrity note, and replaces the interim PDF posted earlier the same day (SHA-256 44b049b29f8ec261650da797cd1b42201313faca76a624d4fd9b60a2031d063d). No finding is changed.

Version 1.0 — first published 17 October 2026. Published from draft v0.6 after the pre-publication re-check of the NHS England pages (unchanged). Declarations completed; data availability and preparation statements finalised for publication; pre-publication check times added; a garbled sentence in the symmetric-standard paragraph repaired. The drafts below were not published.

Draft v0.6 — 17 October 2026. Revised after a fifth adversarial review, which audited the full source package (minor substantive revision). Four-hour comparison corrected; local-reporting and escalation context added; safeguarding acknowledged; placement procedure distinguished from sex verification; code quotation attributed to the code; filenames and quotation-check statement corrected, with a per-string results file. Not published.

Draft v0.5 — 17 October 2026. Revised after a fourth adversarial review (minor substantive revision). Scope and method statements made consistent with the reporting analysis; reporting comparison qualified as a difference in stated terms; link and safety wording narrowed; pagination and v0.3 history corrected. Not published.

Draft v0.4 — 17 October 2026. Revised after a third adversarial review. Paraphrase, safety-benefit, HSSIB and risk wording corrected; reporting-link finding restated on the content of the linked collection guidance; source 2 captured, so all 14 sources are retained; extract limits and link lists recorded; data availability names the separate audit files. Not published.

Draft v0.3 — 17 October 2026. Revised after a second adversarial review (major revision). Legal framework corrected and Equality Act schedules added; HSSIB section rebuilt around R/2024/041 and its parent report; “removed, not replaced” narrowed; empirical table relabelled; reporting-link finding narrowed; declarations made consistent; retained copies recorded for 13 of 14 sources (source 2 not yet retained). [Wording amended in v0.5; v0.3’s entry said “complete source copies retained”.] Not published.

Draft v0.2 — 17 October 2026. Revised after the first adversarial review. Not published.

Draft v0.1 — 17 October 2026. Prepared for review. Not published.