The Anti-Terrorist Branch (or SO13 by its designation) was a Specialist Operations (SO) branch of London's Metropolitan Police Service, formed to respond to terrorist activities within the capital and the surrounding areas.
The Anti-Terrorist Branch (originally known as the Bomb Squad) was formed in January 1971[1] to deal with the Angry Brigade.
During the 1970s it assisted in the campaign against the IRA, alongside Special Branch and the Security Service (MI5).
[citation needed] The Metropolitan Police Commissioner, Ian Blair, announced later that year that some of the specialist operations units were to be "re-aligned".
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