The British Triathlon Federation is the national governing body for triathlon, aquathlon and duathlon in Great Britain.
England Athletics is the membership and development body for athletics and running in England.
British Cycling is the main national governing body for cycle sport in Great Britain.
Cycling Time Trials (CTT) is the national governing body for cycling time trials in England, Scotland and Wales. To ride in any time trial events you need to be a member of a club affiliated to Cycling Time Trials.