The Prevention of Terrorism Act 2005 (c 2) was an Act of the Parliament of the United Kingdom, intended to deal with the Law Lords' ruling of 16 December 2004 that the detention without trial of eight foreigners (known as the 'Belmarsh 8') at HM Prison Belmarsh under Part 4 of the Anti-terrorism, Crime and Security Act 2001 was unlawful, being incompatible with European (and, thus, domestic) human rights laws.