Mark Lockheart is a British jazz tenor saxophonist who was a member of the Loose Tubes big band during the 1980s.

Loose Tubes were a British jazz big band/orchestra active during the mid-to-late 1980s. Critically and popularly acclaimed, the band was considered to be the focal point of a 1980s renaissance in British jazz. It was the main launchpad for the careers of many future leading British jazz players including Django Bates, Iain Ballamy, Eddie Parker, Julian and Steve Argüelles, Mark Lockheart, Steve Berry, Tim Whitehead, Ashley Slater. In 2015, the band reformed to celebrate the 30th anniversary of the band's formation, with concerts at the Cheltenham Jazz Festival, Brecon Jazz Festival and a sold out week at Ronnie Scott's.