Complex sentence: In the 1990s he made guest appearances on tracks by Leftfield, and he has been one of the two vocalists for the UK electronica/reggae band Dreadzone since 1995.
Split into simpler sentences: In the 1990s he made guest appearances on tracks by Leftfield. He is one of the two vocalists for the UK electronica/reggae band Dreadzone, who he has been with since 1995.