Complex sentence: He served in the British army, and was a friend and collaborator to such notables as Timothy Leary, William Burroughs, Alex Trocchi and Youth of Killing Joke, he was particularly active in the Beatnik, psychedelic and Krautrock scenes.
Split into simpler sentences: He served in the British army, and was a friend and collaborator to such notables as Timothy Leary, William Burroughs and Alex Trocchi. He was particularly active in the Beatnik, psychedelic and Krautrock scenes.