Born 8 April 1942 in Leicester, Chapman is best known as a member of the progressive rock band Family (6)
, which he joined along with Charlie Whitney
, in 1966 and also the rock, R&B band Streetwalkers
formed in 1974. His idiosyncratic brand of showmanship when performing and vocal vibrato led him to become a cult figure on the British rock scene. Chapman is claimed to have said that he was trying to sing like both Little Richard
and his idol Ray Charles
. Since the early 1980s he has spent much of his time in Germany and has made occasional appearances there and elsewhere.