Lionrock was a British big beat group, comprising record producer Justin Robertson, MC Buzz B, and Producer, Engineer, Programmer and Synthesist Roger Lyons . Lyons replaced recording engineer Mark Stagg in 1995. Their biggest chart success came in 1998, when "Rude Boy Rock" reached the Top 20 in the UK Singles Chart.

The group had formed in 1991, and signed to Deconstruction Records in 1993.