Conversation so far:
What is Radio Gnome Invisible trilogy?
Flying Teapot was released on 23 May 1973, the same day as Tubular Bells, and was the first installment of the Radio Gnome Invisible trilogy.
What was Tubular Bells?
Mike Oldfield's Tubular Bells.

Question: Was Mike Oldfield part of Gong?
Self-contained rewrite: Was Mike Oldfield part of the band Gong?