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Counter-Terrorism Bill

I want to make a little progress. In much police work, investigation necessarily follows the crime. The presence of a victim is the start point. Forensic material from a crime scene and the ability to gather evidence facilitate an investigation, and very often help to identify a suspect. Upon arrest, only a few days may be needed to question the suspect before a decision is taken on whether to charge them with an offence. Terrorism is different. Because of the severe consequences of an attack, the police and the Security Service often need to intervene before a planned crime takes place. Critically, they may need to intervene at a very early stage in an investigation, before they have had the opportunity to gather admissible evidence, and perhaps with very incomplete intelligence about who is involved.