This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Learn the detailed rules for police interviews under caution in England and Wales, including legal requirements under PACE Code C, the right to legal advice, cautions, recording standards, and safeguards for vulnerable suspects. Essential information for solicitors and the public.
When police in England and Wales question someone about their involvement in a suspected offence, that process is governed by detailed legal rules designed to protect both the efficiency of investigations and the rights of suspects. These rules are encapsulated in the Police and Criminal Evidence Act 1984 (PACE) and its associated Codes of Practice, particularly PACE Code C, which sets out how suspects must be treated, detained and questioned, and PACE Code E, which governs the audio or audio‑visual recording of interviews. Understanding these rules helps suspects, solicitors, students and members of the public know what is lawful, what rights apply and what standards police must follow during an interview under caution.
What Is an Interview Under Caution?
An interview under caution is defined in PACE Code C as the questioning of a person about their involvement or suspected involvement in a criminal offence where the responses may be used as evidence in court.
It is not limited to formal questioning in police stations: even a single question that elicits significant information about presumed involvement in an offence may constitute an interview for legal purposes. This distinction is critical because it triggers safeguards and procedural requirements intended to protect both suspects' rights and the integrity of evidence collection.
When Must a Caution Be Given?
Before any substantive questioning about an offence, police must give a formal caution. The standard caution used in England and Wales states:
“You do not have to say anything. But it may harm your defence if you do not mention when questioned something which you later rely on in court. Anything you do say may be given in evidence.”
Under PACE Code C, a caution must be given:
- Before any questions about an offence are asked.
- If during general questioning, grounds for suspicion focus on the person's involvement in an offence.
- Again after any significant break in questioning before continuing the interview.
The law also requires police to ensure the person understands the caution; if there is any doubt, they must explain it in their own words.
The caution can be given even to someone not under arrest who is voluntarily attending for interview, but police must inform them they are not in custody and are free to leave if they choose.
Fundamental Safeguards and Rights
Right to Legal Advice
Suspects being interviewed under caution have the right to free and independent legal advice before and during the interview. Police must inform them of this right prior to questioning commencing, and an interview must generally be delayed if legal advice is requested.
Right to Silence
A suspect is entitled to remain silent. However, under the Criminal Justice and Public Order Act 1994, in certain circumstances a court or jury may draw adverse inferences from a suspect's silence if proper warnings have been given during the interview. This is reflected in special warnings that police may give under PACE after arrest.
Vulnerable and Juvenile Suspects
Specific safeguards apply for suspects who are juveniles or vulnerable adults. An appropriate adult must generally be present during questioning to support the suspect, assist their understanding of rights, and observe whether the interview is being conducted fairly. Interviews without an appropriate adult present are prohibited except in limited circumstances.
Conduct and Environment of Interviews
Location and Timing
Interviews for suspects who have been arrested should, in general, take place at a police station or other authorised place of detention. Exceptions may apply where delaying questions would likely:
- Interfere with or harm evidence,
- Harm a person or property, or
- Alert others involved in an offence.
Such “urgent” questioning must stop once the risk has passed.
Recording of Interviews
PACE Code E requires that interviews be audio‑recorded (or audio‑visually recorded) to provide an accurate, contemporaneous record of what was said. This ensures evidence integrity and assists courts in assessing reliability. If recording equipment fails, police must follow strict procedures to preserve continuity and accuracy.
Breaking and Rest Periods
Police must provide practical breaks during interviews. Recognised meal periods should be observed and short breaks offered at approximately two‑hour intervals, unless delaying a break is justified by risk or disadvantage to the investigation. An eight‑hour continuous rest period is generally required within a 24‑hour custody period.
Procedural Requirements During Interview
Information Disclosure
Before an interview starts, officers must give the suspect and any legal representatives sufficient information to understand the nature of the offence and why they are suspected. This supports the effective exercise of legal rights without unnecessarily prejudicing the investigation.
Prohibition on Oppression
Police must not use oppressive practices, threats or implied promises to elicit statements. They may only explain what lawful action they propose to take in direct response to a suspect's answers if directly asked. Attempting to influence a suspect's answers undermines the legitimacy of any evidence obtained.
Written Records and Signatures
Suspects are invited to sign the interview record, but refusal to sign must itself be recorded. Written statements under caution are governed by strict procedures and often follow the audio‑recorded interview.
Special Situations
Interviewing After Charge
After charge or notification that the suspect “may be prosecuted”, further interviews about the same offence are generally restricted. However, police may interview in limited circumstances, such as to clarify ambiguous answers, address new significant information that has emerged, or prevent serious harm. Police must caution again before such interviews and observance of rights continues.
Informal Discussions
Police may ask limited factual questions that do not constitute an interview, such as questions merely to establish identity or location of evidence, but they must be careful not to cross the threshold into interview territory that triggers Code C requirements.
If Rules Are Not Followed
When police fail to follow PACE Code C (and related Codes), the consequences can be significant in criminal proceedings. Evidence obtained during interviews that breach procedural safeguards may be excluded by the court. Additionally, suspects may choose to raise concerns about conduct, to seek independent legal advice, or pursue complaints through oversight bodies. Courts also apply fairness principles under the Human Rights Act 1998 when assessing admissibility and overall investigative conduct.
Key Takeaways
Interviews under caution in England and Wales are strictly regulated by law to protect both investigative integrity and individual rights:
- A formal caution must be given before substantive questioning about suspected offences.
- Suspects enjoy key rights, including legal advice and consideration for vulnerability.
- Interviews are governed by detailed procedural standards covering conduct, recording, breaks and environment.
- Violations of these rules can lead to evidence being excluded in court and prompt complaints or legal scrutiny.
Understanding these rules helps individuals and professionals navigate the police interview process and the criminal justice system with greater clarity and confidence.
