a British Army unit located at the vast training area of Canadian Forces Base Suffield near Suffield, Alberta, Canada.

British Army Training Support Unit Belize, the successor of the former British Forces Belize, is the name given to the current British Army Garrison in Belize.

a training support unit of the British Army located in Kenya.

a subdivision of the British armed forces set up on 24 October 1941, to record military events in which the British and Commonwealth armies were engaged.