At the heart of the terrorism policing powers in the Terrorism Act 2000 is arrest without warrant under section 41. Its traditional purpose is to allow for the interrogation of suspects. A second, and mounting, reason is to facilitate forensic testing by explosives analysis, DNA profiling,...

This introductory chapter to this illuminating book offers a timely assessment of the development and proliferation of precursor crimes of terrorism, exploring the functions and implications of these new expanding offences in different jurisdictions. In response to new forms modes and sources of...