Magnum were an English progressive rock, melodic hard rock and AOR band. They were formed in Birmingham in 1972 by Tony Clarkin and Bob Catley (vocals) in order to appear as the resident band at the Rum Runner nightclub in the city. Magnum have undergone several changes in personnel over the years; however, the core of Catley and Clarkin remained until Clarkin's death in 2024.

Anthony Michael Clarkin was an English musician and songwriter, best known as the guitarist of the rock band Magnum. He was the sole songwriter throughout Magnum's history, writing all of the material on their 23 studio albums as well as on two studio albums by Magnum spin-off group Hard Rain.