Detention, Disclosure and Legal Advice

Custody is an active phase of the investigation

The journey has ended, but the investigation has not paused. Searches may be continuing. Witnesses may be giving accounts. Other suspects may be separated. New information may reach investigators before the detainee sees a solicitor. The police may be gaining evidence while the detainee is gaining only fatigue, uncertainty and a desire to leave.

That imbalance explains why custody cannot be understood as a waiting room before interview. Decisions about detention, health, legal advice, disclosure and readiness for interview are already shaping the evidential record. A poor decision made during this period can be permanent. A well-managed period of custody can preserve fairness, expose delay and improve the reliability of everything that follows.

The custody-control method

1. Authorise: identify the offence, the grounds recorded for detention and the investigative steps said to require custody.
2. Safeguard: address health, medication, sleep, vulnerability, communication needs, an appropriate adult and effective participation.
3. Record: use the custody record, the client’s account and objective timings to reconstruct what has happened and preserve any concern.
4. Disclose: establish the nature of the allegation, the basis of suspicion and the issues investigators intend to raise.
5. Advise: obtain and test the client’s account privately, distinguish memory from assumption, and evaluate the competing consequences of the next step.
6. Review: ask repeatedly what remains to be done, whether it has been pursued diligently and whether it still requires the client to be detained.

Arrival: arrest and detention are different decisions

An arrest does not automatically authorise a period of detention at the police station. The custody officer must make a distinct decision under the Police and Criminal Evidence Act 1984. The officer is ordinarily at least the rank of sergeant and performs a statutory custody role separate from the investigative team. The safeguard depends on an independent judgment, not the administrative confirmation of a decision made elsewhere.

Where there is not yet sufficient evidence to charge, detention may ordinarily be authorised only if the custody officer has reasonable grounds for believing it is necessary to secure or preserve evidence relating to the offence, or to obtain such evidence by questioning. The reason must be recorded. Once the evidential position changes, the statutory route changes with it. Custody is therefore a continuing legal state, not a single permission that runs untouched until a clock expires.

A lawful arrest may be followed by detention that later ceases to be justified. Equally, an arguable issue about arrest does not remove the need to manage custody safely and strategically. The two questions should be preserved without allowing one to obscure the other.

The custody desk: routine questions with legal consequences

Booking-in can feel repetitive and impersonal. Identity is established, the arrest circumstances are presented, property may be removed and recorded, a search may take place, and questions are asked about medication, injury, substance use, mental health and immediate risks. A custody record is opened and continuing rights must be explained.

Some answers concern welfare rather than the allegation and should be given accurately. A detainee should not withhold a medical condition, medication, communication difficulty or safeguarding risk in an attempt to appear strong or cooperative. At the same time, the custody desk is not the place to begin an improvised account of the suspected offence. Cooperation with a lawful custody process is different from volunteering evidence about the allegation.

Health, vulnerability and effective participation

Fitness is not established merely because a person is conscious, articulate and able to answer ordinary questions. The real issue is whether the detainee can understand the allegation, retain and evaluate advice, communicate reliably, recognise uncertainty and withstand the pressures of the proposed process. A person may be fit to remain in custody but not presently fit to be interviewed. Another may be able to participate with rest, treatment, an interpreter, an appropriate adult or adjustments to questioning.

Vulnerability is frequently hidden. Professional success, education and confidence outside custody do not answer whether assistance is needed inside it. Trauma, autism, learning disability, cognitive impairment, mental illness, brain injury, medication, intoxication, withdrawal, exhaustion and acute distress can affect participation in different ways. The issue is functional: what support does this person need to understand, communicate and make reliable decisions here?

The appropriate adult

Children and vulnerable adults may require an appropriate adult under PACE Code C. The appropriate adult supports and assists the detainee, promotes communication and helps ensure that the process is conducted properly and fairly. The role is not a substitute for a solicitor. Legal advice and participation support address different risks, and a detainee may need both.

The custody record: the official chronology, not the whole truth

The custody record is one of the most important documents created during detention. It should record significant events and decisions: arrival, detention authorisation, rights, legal-advice requests, welfare concerns, healthcare, rest, interviews, reviews, delay, property, charge and release. It can establish when something happened, what reason was recorded and whether a concern was raised.

It should not be treated as infallible. Entries may be brief, retrospective or expressed from the police perspective. The solicitor should compare it with the client’s account, attendance notes, interview recordings, body-worn video, CCTV, healthcare information and objective timings. A discrepancy may be harmless. It may also expose a delay, an unmet need, an inaccurate record or a safeguard that existed only on paper.

• When was the client arrested and when did they arrive?
• When was detention authorised, and on what recorded basis?
• When was legal advice requested, contacted and received?
• What health, vulnerability or communication issue was raised, and what happened next?
• Which investigative steps explain periods of waiting?
• When were reviews due and completed, and what reasons supported continued detention?

Continuing rights in custody

A detainee must be informed clearly of continuing rights, including the right to consult privately with a solicitor and receive free independent legal advice, the right to have someone informed of the arrest, and the right to consult the applicable PACE Codes. Written information about rights and entitlements must also be provided. These are practical safeguards designed to reduce the imbalance created by detention.

Free and independent legal advice

Police-station legal advice is free and is not means-tested. A detainee may ask for a named solicitor or the duty solicitor. The duty solicitor is independent of the police. Requesting advice is not evidence of guilt, and declining it does not establish innocence. The relevant contrast is between an informed decision and an uninformed one.

Access to legal advice may be delayed only in tightly defined circumstances and under the safeguards in PACE and Code C. Delay is exceptional, not a device for administrative convenience or investigative advantage. The statutory conditions, authorisation, reasons and duration must be examined carefully. A separate legal regime applies to terrorism detention.

Informing another person

A detainee may ordinarily ask for one person to be informed of the arrest and place of detention. That is a right to notification, not an unrestricted right to conduct calls or discuss the case. Delay is possible only on specified grounds and with appropriate authority. Messages should not become a route for comparing accounts, contacting witnesses or circulating an explanation of the allegation.

What the solicitor actually does

The solicitor does more than attend an interview. By the time advice is given, the process may have been under way for hours. The solicitor must reconstruct what has happened, identify what the police seek to do next and decide whether the client is capable of making a reliable decision about it.

Private consultation: rebuilding decision quality

Consultation is private and legally privileged. Its purpose is not merely to invite the client to tell a story and then repeat it. The solicitor must separate what the client remembers from what they infer, what they were told, what they reconstructed later and what they do not know. An apparently detailed account may be less reliable than a carefully bounded one.

The consultation should also identify what has already happened: remarks at arrest, conversations in transport, searches, access requests, identification of property, contact with others and anything said at the custody desk. The police interview cannot be advised upon as though the evidential record begins when the recorder is switched on.

• What precisely is alleged, and what remains vague?
• What does the client know from direct recollection?
• Where is the client estimating, assuming or adopting another person’s account?
• What material could test or support the account?
• What fact appears to be missing from the police case?
• What professional, regulatory or separate criminal exposure could an answer create?
• Is the client presently able to understand and maintain the advice?

Disclosure before interview: enough to decide, not the whole case

Before interview, the suspect and solicitor must be given sufficient information to understand the nature of the suspected offence and why the person is suspected. That safeguard enables an informed decision about interview. It does not require advance service of the complete prosecution case, every witness statement or every item investigators may deploy.

The value of disclosure is not measured only by volume. A long chronology may still conceal the central allegation. A short verbal briefing may be sufficient on one issue but inadequate on another. The solicitor should analyse both what has been disclosed and what has been withheld, without assuming that absence from disclosure means the police do not possess it.

The three-layer disclosure audit

1. The allegation: what conduct, event, period and offence are said to be involved?
2. The basis of suspicion: what material or circumstance connects this client to the alleged conduct?
3. The investigative purpose: what fact does the proposed interview appear designed to confirm, obtain, test or exclude?

The third question is strategic rather than a separate disclosure entitlement. The police may not reveal every evidential gap. The defence must infer cautiously from the allegation, the disclosed material and the proposed questioning, then keep that inference under review as new information appears.

When disclosure is inadequate

Inadequate disclosure does not produce one automatic interview strategy. The solicitor should identify the missing point, explain why it prevents reliable advice and request focused clarification. That request and the response should be recorded. The answer may be further disclosure, more consultation time, a different interview approach or, in some cases, advice not to answer particular questions.

The problem should be expressed precisely. “Disclosure is poor” is less useful than: the alleged act has not been identified; the relevant period is unclear; the basis on which authorship is alleged has not been stated; or the client cannot understand which transaction is being questioned. Precision makes the fairness issue visible and preserves it for later review.

The detention clock: ceilings, not entitlements

PACE imposes strict limits on detention without charge. In an ordinary PACE investigation, the normal maximum is 24 hours from the relevant time. For an indictable offence, a superintendent may authorise detention up to 36 hours where the statutory conditions are met, including necessity to secure or preserve evidence or obtain evidence by questioning and a diligent and expeditious investigation. Magistrates may issue warrants permitting further detention, subject to statutory conditions, to an overall maximum ordinarily reaching 96 hours from the relevant time.

Those periods are outer limits. They do not give investigators blocks of custody time to use automatically. The client must be released when detention is no longer authorised or necessary, even if the maximum has not been reached. Special rules affect the calculation of the relevant time in particular circumstances, and separate regimes apply to terrorism and certain other powers.

Reviews of detention: unfinished work is not enough

Reviews are substantive safeguards. The review officer should examine whether detention remains necessary, whether the investigation is being conducted diligently and expeditiously, and whether the detainee’s rights and welfare have been respected. The detainee or solicitor should have an opportunity to make representations, subject to the lawful limits of the process.

The fact that work remains unfinished does not itself justify continued detention. The proper analysis asks what the work is, why it matters, what has caused any delay and why the client must remain in custody while it is completed. Waiting for an officer, a room or an administrative convenience is not automatically equivalent to an investigative necessity.

• What has happened since the last authorisation or review?
• Which precise step remains outstanding?
• Why does that step require continued detention?
• Has it been pursued diligently and expeditiously?
• Is the client now unfit, too fatigued or otherwise unable to participate reliably?
• Could the person be released while the investigation continues?

Delay, rest and the pressure to “get it over with”

Delay changes decision quality. Anxiety and fatigue can make a detainee more willing to accept an interview they do not understand, abandon legal advice or supply detail merely to make the process end. That pressure may exist without any deliberate misconduct. It must still be recognised and managed.

A solicitor should distinguish delay needed for healthcare, an appropriate adult, an interpreter, disclosure or genuine investigative work from delay caused by poor organisation. Rest requirements, fitness and the time of day matter. The lawful availability of an interview does not make an exhausted client a reliable interviewee.

Preparing the hand-off to interview

This chapter ends before the response strategy is selected and implemented in interview. By that point, the defence should have established the custody position, addressed welfare and participation, reconstructed the existing record, obtained sufficient disclosure, tested the client’s account and identified the decision that interview is intended to advance.

Immediate custody checklist

• Ask for free independent legal advice and do not abandon it merely to shorten custody.
• Give accurate information about health, medication, vulnerability and immediate safeguarding needs.
• Do not discuss the allegation with officers, other detainees, family members or anyone contacted from custody before advice.
• Tell the solicitor everything already said, signed, identified, handed over or accessed.
• Make sure a necessary appropriate adult, interpreter or communication support is considered.
• Treat the custody record and every detention review as part of the legal and evidential history.
• Remember that 24, 36 and 96 hours are ceilings within statutory regimes, not automatic periods of detention.

Legal source note

This chapter was verified against the Police and Criminal Evidence Act 1984, including sections 36–45, 54, 56 and 58, and PACE Code C (2023). It states the ordinary PACE regime. Terrorism detention and other modified powers or time calculations require advice on their particular provisions.