(2) how many people have been (a) arrested, (b) charged and (c) convicted of terrorist-related offences under (i) the Terrorism Act 2000, (ii) the Anti-Terrorism, Crime and Security Act 2001, (iii) the Prevention of Terrorism Act 2005 and (iv) the Terrorism Act 2006;
(3) how many people arrested under (a) the Terrorism Act 2000, (b) the Anti-Terrorism, Crime and Security Act 2001, (c) the Prevention of Terrorism Act 2005 and (d) the Terrorism Act 2006 have been (i) charged with and (ii) convicted of a non-terrorism related offence since each Act came into force.
Statistics on the number of arrests, charges and convictions under the Terrorism Act 2000 and under other legislation are available on the Home Office website. The figures are not broken down in the format requested as a power of arrest only exists under S41 of TACT 2000. There is no power of arrest under any of the other Acts mentioned.
http://www.homeoffice.gov.uk/security/terrorism-and-the-law/
Since 11 September 2001 to 31 March 2007, there have been 1,228 arrests under the Terrorism Act 2000 or under other legislation, where the investigation was conducted as a Terrorist investigation. Of the total 1,228 arrested, 1,165 were arrested under the Terrorism Act 2000 and 63 arrests under other legislation, where the investigation was conducted as a terrorist investigation; 132 were charged with terrorism legislation offences only, and 109 charged with terrorism legislation offences and other criminal offences. In 2007, 37 individuals were convicted in 15 significant terrorist cases. 21 of those individuals pleaded guilty. So far in 2008,18 people have been convicted of significant terrorist related offences of which seven individuals pleaded guilty.