British guitarist and singer John Tams is, according to Mojo magazine, "one of the unsung gods of folk." Although his debut solo album, Unity, wasn't released until 2000, Tams has made his presence felt among the British folk community for more than three decades. A member of Ashley Hutching's Albion Band from 1976 until 1987, he continued his musical assault as leader of the political British folk-rock band Home Service and pit director of the National Theater. Launching a record label, No Masters Co-operative, with producer Jim Boyes in the early '90s, he worked with several...