The Right to Remain Silent in the UK: The Caution and Adverse Inferences

The right to remain silent still exists in England and Wales, but it is not absolute. Staying silent when questioned by police can, in certain circumstances, allow a court to draw an inference against you later at trial, which is exactly what the police caution is designed to warn you about.

The Caution: What Police Must Tell You

Before questioning a suspect, police in England and Wales must give the caution set out in PACE Code C, paragraph 10.5:

"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."

The three sentences do three different jobs. The first confirms that you are not legally compelled to answer questions. The second is the warning: staying silent now about something you later raise as part of your defence can be held against you at trial in specific, limited ways, described below. The third confirms that anything you do choose to say can be used as evidence, whether it helps or harms your case.

This caution is given at specific points, including at arrest and again before a formal interview begins, precisely because the adverse-inference rules below are tied to what happens at those moments. If you want to understand the surrounding custody process, including the right to free legal advice before any of this comes up, see our guide to being arrested.

Adverse Inferences: Sections 34 to 38

The Criminal Justice and Public Order Act 1994 sets out exactly when and how a court or jury can draw an adverse inference from silence, in sections 34 to 38. The main provisions are:

• Section 34: allows an inference where a suspect fails to mention, when questioned or charged, a fact they later rely on in their defence at trial.
• Section 36: allows an inference where a suspect fails or refuses to account for an object, substance, or mark found on them, their clothing, or in their possession.
• Section 37: allows an inference where a suspect fails or refuses to account for their presence at a particular place.

The same range of sections also covers what happens if a defendant does not give evidence at their own trial.

These provisions are narrower than they might sound. An inference is only available in the specific circumstances each section describes; it is not a general rule that silence equals guilt. A court or jury has to be directed carefully on when an inference is even available, and the inference itself is only ever one part of the overall picture of evidence, weighed alongside everything else in the case rather than treated as a shortcut to a particular conclusion.

An Important Safeguard: Access to Legal Advice

Section 34(2A) of the 1994 Act blocks an adverse inference for failing to mention a fact if the suspect was at an authorised place of detention at the time and had not been allowed the opportunity to consult a solicitor before being questioned, charged, or informed as described in the section. In other words, silence before getting proper legal advice in custody is protected in a way that silence afterwards is not.

This safeguard is closely tied to the right to free legal advice under PACE section 58. Because everyone in custody in England and Wales is entitled to consult a solicitor privately and free of charge, the law expects that right to be exercised, or at least offered, before it becomes fair to hold silence against someone at trial.

The Section 38(3) Safeguard: No Conviction on an Inference Alone

Perhaps the most important limit on all of this is section 38(3). It provides that a person cannot be sent for trial, cannot have a case to answer, and cannot be convicted, based solely on an adverse inference drawn under these provisions. An inference can support other evidence in the case; it can never substitute for it. There must always be other evidence pointing to guilt before an inference from silence can play any part in a conviction.

Scotland: A Different Caution and a Stronger Silence Tradition

Scotland uses its own caution wording, distinct from the England and Wales version, and historically has treated the right to silence as a stronger protection. Scots law does not have a direct equivalent, in the same form, to the adverse-inference provisions in sections 34 to 38 of the 1994 Act. The exact current wording of the Scottish caution is a matter for Scottish police procedure rather than the England and Wales sources this guide relies on, so it is not reproduced here.

Northern Ireland: The Original Model

Northern Ireland has actually run an adverse-inference regime for longer than England and Wales. The Criminal Evidence (Northern Ireland) Order 1988 predated the 1994 Act and was the model that the England and Wales provisions were later based on. Northern Ireland has its own version of these rules under that Order, rather than the Criminal Justice and Public Order Act 1994 itself.

This guide explains the general law on the right to silence and adverse inferences; it is not legal advice for a specific case. Anyone being questioned by police can get free legal advice through the duty solicitor scheme. For related rights during arrest, see being arrested, and for the wider picture, see the UK Criminal Law hub.