Conversation so far:
Who was in the Gay Liberation Front?
Peter Tatchell had accepted being gay in 1969, and in London became a leading member of the Gay Liberation Front (GLF) until its 1974 collapse.
What role did Peter Tatchell play in the Gay Liberation Front?
Peter Tatchell was prominent in organising sit-ins at pubs that refused to serve poofs and protests against police harassment and the medical classification of homosexuality as an illness.

Question: What did the GLF do while Tatchell was a member?
Self-contained rewrite: What did the Gay Liberation Front do while Peter Tatchell was a member?