Started at the Hackney Barbarians in 1987, and moved onto the London Olympians in 1988 where he was largely the backup to import QB's. His talent showed through though, and he was selected as the starting QB for Great Britain in their successful 1989 European Championship. Moved to the London Capitals in 1990 winning two titles, and in 1991 started in the GB Lions European Championship win. Moved onto the Kent Mustangs in 1992, taking them to the Division Two Bowl game. Moved to the Northants Storm in 1993, and then onto the London Rockets in 1994. He left the sport in the 1995.
Franklin started for the London O's from the 1996 season, where he led them to the Division Two title. In 1997, he led the GB Lions to a thrilling European Championship qualifying win in Madrid with a late bomb to Mark Cohen that secured a 17-14 win (his first GB cap). In 1999 he moved to the Sussex Thunder where they made the playoffs in two successive seasons, and following the demise of the Thunder he returned to the Olympians in 2001 where he played until 2006. In 2007 he joined the London Blitz where he won a national title, and in 2008 he led the GB Lions to a friendly win over France (11 years after he first played for the national team).
Britton started at the Brighton B52s Juniors and Youth Flag team, before joining the London Capitals. He was a three-year starter for the team, playing at both the quarterback and free safety positions. He led the team to the national championship in 1999 and was named the championship MVP. Britton also played four years for the All-Great Britain national team. Serving as the team’s captain, the squad won two silver medals at the European championships. He became the first English youngster to establish himself at quarterback at College level in the US. Attended SUNY-Morrisville for two years. While at Morrisville, he was the starting quarterback and was a second-team all-conference selection in 2001. Moved to Cornell University for his senior year in 2003,
In 2006 Tom Britton used his feet as much as his arm in the 2006 campaign to lead London Blitz to their first ever Britbowl appearance and his return to the US for work left the Blitz with a major hole at this pivotal position going into the 2007 BAFL Premier campaign.