Hello John,
I saw your email asking about Bill. He died over 20 years ago. Mycolleague, John Bradley could tell you more as I never met him. John is the son of Les Bradley who ran the original Streetly Electronics in Birmingham. I met John and Les in 1989 and Bill had been dead several years then. Send John an email to BRADMATICS@aol.com and I'll tell him to expect correspondence from you. John knew him well.
Best wishes,
Martin