The length of time you can be detained without charge depends on a number of factors.
In normal circumstances, the Police have the power to detain a person for a period not exceeding 24 hours. This is sometimes known as the ‘custody clock’. This period includes (collectively) the period of time that a person is detained during the course of an investigation. Multiple attendances at a police station may be required to answer bail before a charging decision is made.
The Police may be able to apply to extend the period of detention to a maximum of 96 hours, depending on the seriousness of the offence.
Where it’s necessary to secure, preserve or obtain evidence — or where the offence concerned is an indictable offence and the investigation is being conducted diligently and expeditiously — an officer of sufficient seniority (superintendent or above) may authorise the continued detention of a person up to a maximum of 36 hours.
A decision to extend the period of detention can be challenged. You (or your solicitor) are entitled to make representations regarding continued detention before authorisation is given.
Where it’s considered necessary to detain a person beyond 36 hours, the Police must obtain a warrant of further detention by making an application to the Magistrates Court, which may authorise a further period of 36 hours (up to a maximum of 72 hours).
The Magistrates Court will consider whether continued detention is justified and lawful. The Court must be satisfied that further detention is justified.
If after 72 hours a period of further detention is necessary, the Police may apply to the magistrate’s court to extend the period. The Magistrates Court may extend the period of detention on the basis that further detention is justified, providing that the maximum length of detention doesn’t exceed 96 hours since the person was first detained.
Where the offence under investigation concerns an offence under the Terrorism Act, the Police have the authority to detain somebody for 14 days without charge without obtaining a warrant.