Police powers sit in the Machinery of Justice section of Paper 1 in Cambridge A Level Law 9084. The topic is highly structured – nearly everything comes from the Police and Criminal Evidence Act 1984 (PACE) and its Codes of Practice – which makes it one of the easiest places to pick up accurate AO1 marks, provided you learn the section numbers.
Why Police Powers Matter
The law must balance two interests: giving the police enough power to investigate crime, and protecting individuals from abuse of that power. Almost every evaluation point in this topic comes back to that balance.
Stop and Search
- PACE ss1–7 and Code A – a constable may stop and search a person or vehicle in a public place for stolen or prohibited articles, but only with reasonable grounds for suspicion. Suspicion cannot be based on personal factors alone such as age, race or appearance.
- Before searching, the officer must give their name and station, the object of the search, the grounds for it and the person’s entitlement to a record.
- In public, only outer clothing (coat, jacket, gloves) can be removed.
- Misuse of Drugs Act 1971 s23 – a separate power to search for controlled drugs.
- Terrorism Act 2000 – additional stop and search powers relating to terrorism.
Powers of Arrest
Under PACE s24 (as amended by the Serious Organised Crime and Police Act 2005) and Code G, a constable may arrest without a warrant anyone who is about to commit, is committing or has committed an offence, or whom they have reasonable grounds to suspect of these – but only if the arrest is necessary for a listed reason, for example to establish the person’s name or address, prevent injury or damage, protect a child or vulnerable person, or allow the prompt and effective investigation of the offence.
The person must be told they are under arrest and the grounds, even if these are obvious (Christie v Leachinsky (1947)).
Detention at the Police Station
Time limits (PACE ss34–46, Code C)
- A suspect can normally be held for 24 hours without charge.
- A superintendent can extend this to 36 hours for an indictable offence.
- Magistrates can authorise further detention up to a maximum of 96 hours.
- Detention must be reviewed regularly by a review officer.
Rights of the detained person
- s56 – the right to have someone informed of the arrest.
- s58 – the right to free legal advice (can be delayed only in limited cases for indictable offences).
- An appropriate adult must be present for juveniles and vulnerable adults (Code C).
- Interviews must be recorded (ss60–60A, Codes E and F).
Treatment of suspects
The syllabus covers searches at the station (ss54–55, including intimate searches), fingerprints (s61), intimate and non-intimate samples (ss62–63), the conditions of interview rooms and the role of the custody officer, who is responsible for the suspect’s welfare and for keeping the custody record.
What Happens When the Police Break the Rules?
- s76 PACE – a confession obtained by oppression, or in circumstances likely to make it unreliable, must be excluded.
- s78 PACE – the court has discretion to exclude any evidence whose admission would have such an adverse effect on the fairness of proceedings that it ought not to be admitted (R v Samuel (1988) – denial of access to a solicitor).
Evaluating Police Powers
- Safeguards: PACE codified powers in one place, requires records, and gives suspects clear rights.
- Criticisms: “reasonable suspicion” is vague; stop and search has historically been used disproportionately against some groups; rights can be delayed; and exclusion of evidence under s78 is discretionary rather than automatic.
When writing a 15-mark evaluation, use the balance between crime control and civil liberties as the spine of your answer. Our guide to answering 25-mark evaluation questions shows the same technique in action.
Free Paper 1 Past Papers – Download Now
The fastest way to lock in this topic is to practise on real Cambridge questions. Our resource hub has AS and A2 Level Law 9084 past papers for Papers 1–4, with mark schemes, free to download:
→ Download Free A Level Law Past Papers & Mark Schemes
About Sir Owais Mirchawala’s A Level Law Classes
Sir Owais Mirchawala teaches Cambridge International AS & A Level Law (9084) to students across Pakistan and the Gulf. His AS Level Law course covers Paper 1 topic by topic through recorded lectures you can study at your own pace, with topical past paper practice, class notes, WhatsApp query support, and homework and mock exam marking. Learn more about Sir Owais Mirchawala, explore the AS Level Law course, read the A Level Law course FAQs, or get in touch to enrol.
Frequently Asked Questions
How long can the police hold someone without charge?
Normally 24 hours, extendable to 36 hours by a superintendent for indictable offences, and up to 96 hours with magistrates’ warrants of further detention.
Do I need to learn the section numbers of PACE?
Yes – the 9084 syllabus lists the relevant sections explicitly, and citing them accurately is an easy way to show precise AO1 knowledge.
Is police powers on the AS or A2 papers?
It is part of Paper 1 (English Legal System), which is an AS component.
Final Thought
Police powers is a “learn it precisely” topic: memorise the PACE sections, the time limits and the key rights, then practise evaluating the balance between effective policing and individual freedom.