Complex sentence: Later, he joined Blazer Blazer, along bassist Steve Barnacle (later in Visage), with whom toured a lot in 1979 and 1980, and released an only single, "Cecil B. Devine", in 1979.
Split into simpler sentences: Later, he joined Blazer Blazer, along with bassist Steve Barnacle (later in Visage), with whom he toured extensively in 1979 and 1980. They released just one single, "Cecil B. Devine", in 1979.