The Home Office collates statistics on the number of people who have been held for 28 days in pre-charge detention since 2005. These details are included in a Bulletin published for the first time on 13 May 2009 (Statistics on Terrorism Arrests and Outcomes Great Britain 11 September 2001 to 31 March 2008).
The details for 2010 are not yet available. The first edition of the Bulletin is available at:
The second issue of the Bulletin was published on 26 November 2009 and is available via the following link:
The third issue of the Bulletin was issued on 26 February 2010 and is available via the following link:
The fourth issue of the Bulletin was issued on 10 June 2010 and is available via the following link: