Introduction
Being arrested can be frightening and confusing, especially if you do not know what happens next.
In England and Wales, the police must follow strict rules when arresting, detaining and questioning someone. These rules are designed to protect your rights and ensure that any investigation is handled fairly.
If you are arrested, you have the right to know why. You also have the right to free legal advice, the right to have someone told where you are and the right to medical help if needed.
When Can the Police Arrest Someone?
Police officers cannot arrest someone arbitrarily. They must have reasonable grounds to suspect that a person is involved in a criminal offence.
Additionally, the arrest must be necessary. This means the officer must believe the arrest is required for reasons such as:
- Preventing injury or harm
- Preventing damage to property
- Allowing prompt and effective investigation
- Preventing the suspect from disappearing
These powers are set out under Section 24 of the Police and Criminal Evidence Act 1984.
If the arrest is not properly justified, this may become relevant later in the case.
What Must the Police Tell You When Arresting You?
When making an arrest, officers must follow specific legal requirements.
They must clearly inform you that:
- You are under arrest
- The reason for the arrest
- The legal basis for their action
Officers usually state the well-known caution:
“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.”
This caution is designed to ensure you understand your right to remain silent and the possible consequences of withholding information during questioning.
For that reason, legal advice before interview is important.

Your Legal Rights in Police Custody
Once a person is taken to a police station, they will be placed in custody and processed by a custody officer.
A custody officer must consider whether your detention is lawful and necessary. They must also explain your rights.
Several rights apply immediately once you are in custody.
The Right to Legal Advice
One of the most important rights after arrest is the right to legal representation.
You are entitled to consult a solicitor before any police interview takes place. A solicitor can:
- Explain the allegations
- Advise whether to answer questions
- Ensure procedures are followed correctly
- Protect your legal interests during questioning
A solicitor can explain the allegation, advise you before interview and protect your position during questioning.
If you ask for legal advice, the police should not normally interview you until you have received it, unless limited exceptions apply.
The Right to Remain Silent
You are not required to answer police questions.
However, because of the caution, remaining silent can sometimes affect your defence later if you rely on something in court that you did not mention in interview.
This does not mean you should answer questions without advice. A solicitor can advise whether it is better to answer questions, provide a prepared statement, or remain silent, depending on the evidence and circumstances.
The Right to Medical Assistance
Anyone in police custody who requires medical attention has the right to receive it.
A healthcare professional can be called to assess medical conditions or injuries.
This ensures detainees are not placed at risk while in custody.
The Right to Inform Someone of Your Arrest
You also have the right to have someone informed of your arrest.
This may be a:
- Friend
- Family member
- Employer
The purpose of this right is to ensure that people are not detained without their whereabouts being known.
How Long Can Police Detain You After Arrest?
Police cannot detain someone indefinitely without charge.
In most cases, the maximum detention period without charge is:
24 hours
However, this can be extended under certain circumstances:
- Up to 36 hours for serious offences with senior authorisation
- Up to 96 hours with court approval for indictable offences
Detention must be reviewed, and the police must be able to justify why continued detention is necessary.
What Happens During a Police Interview?
A police interview is a formal process used to gather evidence.
Interviews are usually:
- Audio recorded
- Conducted under caution
- Carried out by investigating officers
The police may ask about the allegation, your movements, your contact with others, documents, messages, CCTV, forensic evidence, or other material.
Your solicitor may:
- Advise you how to respond
- Request clarification of questions
- Intervene if procedures are not followed correctly
What is said in interview can become part of the evidence in the case, so the interview stage should be treated seriously.
Facing Legal Issue?
Speak to our Criminal Defence team for confidential advice on your position and next steps.
Strictly Confidential and No Obligation

Why Legal Advice Is Crucial After an Arrest
The early stages of a criminal investigation are often the most important.
Statements made during police interviews can form a central part of the prosecution case.
An experienced criminal defence solicitor can:
- Assess the strength of the evidence
- Ensure procedures are lawful
- Advise on interview strategy
- Protect your legal rights
Legal advice can also help prevent avoidable mistakes, such as giving unclear answers, contacting witnesses, or discussing the case in a way that may later cause problems.
Speak to a Criminal Defence Solicitor
If you or someone close to you has been arrested or is under investigation, obtaining professional legal advice is essential.
Our Criminal Defence solicitors can advise you before interview, protect your rights in custody and help you understand what may happen next.
Contact our team to discuss your situation confidentially.
If you require assistance following an arrest or police investigation, contact our criminal defence team for confidential legal advice.
5 Key Takeaways
- Police must have proper legal grounds to arrest someone.
- You must be told that you are under arrest and why you are being arrested.
- You have the right to free legal advice at the police station.
- You do not have to answer police questions, but silence can sometimes have legal consequences.
- Police detention is time-limited and must be properly justified.
Frequently Asked Questions
You have the right to be informed of the reason for your arrest, to consult a solicitor, to remain silent during questioning, and to have someone informed of your detention.
Police must have reasonable grounds to suspect involvement in an offence before making an arrest.
In most cases police can detain someone for up to 24 hours without charge, although this can be extended in certain serious investigations.
Yes. Anyone arrested has the right to consult a solicitor before being interviewed by the police.
You will usually be taken to a police station, booked into custody and told your rights. The custody officer will consider whether detention is lawful and necessary.
Yes. You have the right to remain silent, but this can sometimes have legal consequences. You should take legal advice before deciding how to respond.
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