Complex sentence: He served as Director-General of the BBC between July 1982 and January 1987, when he was forced to resign from his post by the BBC Governors following several difficult years for the Corporation, sustained pressure from the Thatcher government and editorial decisions which proved controversial.
Split into simpler sentences: He served as Director-General of the BBC between July 1982 and January 1987. In early 1987, Milne was forced to resign from his post as DG by the BBC Governors following several difficult years for the Corporation, sustained pressure from the Thatcher government and editorial decisions which proved controversial.