The London Warriors are an American football club based in Thornton Heath, London, England. They compete in the BAFA National League Premier Division South, the highest level of British American football. They operate from Selhurst Sports Arena and were formed in 2007 as the London Cobras, but changed their name to the Warriors a couple of years later.

The BAFANL (BAFA National Leagues) is the primary American football domestic league competition in Great Britain. Originally formed in 1983, the league is run by the British American Football Association to coordinate contact football within England, Scotland and Wales. The top level is the Premier Division and the BritBowl is the annual final championship game. The league was reformed in 2010 following the collapse of the British American Football League, which had run in a number of different guises since the early 1980s. Previous names of the league were the UKAFL (UK American Football League), the Budweiser League and the BNGL (British National Gridiron League). From 1998 until 2005 the league was known as the BSL (British Senior League). Tensions grew throughout 2009 between the directors of BAFL and those of the governing body the British American Football Association, and at the beginning of 2010 the BAFL formally, but unconstitutionally, withdrew from BAFA. This led to uproar from the teams within BAFL, ultimately signalling the end for BAFL as an entity. The league ceased operations on 1 April 2010 and was replaced by the BAFA Community Leagues for the 2010 season, rebranding in 2011 to become the BAFANL. Notable players to have come from the BAFANL who have gone on to play in the NFL are Efe Obada, Aden Durde, Jermaine Allen and Marvin Allen.