The list of British 800 metres athletics champions covers four competitions; The AAA Championships were open to international athletes but a guest international was not considered the National Champion in this list if they won the relevant Championship, that title going to the highest placed British athlete in the event.
Despite this, the AAA Championships were regarded as more prestigious than the British-only UK Championships event for most of the latter's existence, although both were recognised as national championships.
While the AAA Championships continue, they are no longer regarded as crowning a British champion.
Michael Rimmer with seven titles, and Diane Modahl née Edwards and Kelly Holmes, with eight titles each, are the most successful British athletes in the history of the event domestically.
dual championships era 1977-1987 dual championships era 1988-1997 2007 to present