Complex sentence: Neal Kay is a London-based DJ who along with Tommy Vance was a significant factor in the rise of the New Wave Of British Heavy Metal, and was one of the first people to use heavy metal as a term for the new musical genre.
Split into simpler sentences: Neal Kay is a London-based DJ who along with Tommy Vance was a significant factor in the rise of the New Wave Of British Heavy Metal. He was one of the first people to use "heavy metal" as a term for the new musical genre.