Thomas Derbyshire, known professionally as Tommy Cannon, is an English comic, actor and singer. He is best known as the straight man of the comic double act Cannon and Ball, until Bobby Ball's death in 2020, in TV programmes such as The Cannon and Ball Show.

Tommy Cannon and Bobby Ball, known collectively as Cannon and Ball, were an English comedy double act best known for their comedy variety show The Cannon and Ball Show, which lasted for nine years on ITV. The duo met in the early 1960s while working as welders in Oldham, Lancashire. They started out as singers working the pubs and clubs of Greater Manchester and switched to comedy after being told comics earned an extra £3 a night. They continued to work as a comic duo on television and in theatre and pantomime. Their partnership ended when Ball died on 28 October 2020 following a COVID-19 diagnosis.