Lord Baker was Chairman of the Conservative Party at the time of Margaret Thatcher’s fall. He’d been given the job with specific aim of keeping in No 10 - and until November 1990 all seemed to be going fine. But Mrs Thatcher lost her temper with Geoffrey Howe in cabinet - he resigned - and gave a devastating speech to parliament calling for her to go. Even then he thinks she could have survived had she been willing to schmooze backbenchers, appoint a decent campaign manager, and face down her cabinet. Had she done so - her chairman thinks she would have gone on to an unprecedented fourth election victory

Previous episodes include interviews with politicians Tom King, John Gummer, John Wakeham, Lord Mackay - and officials Robin Butler, Caroline Slocock,Charles Powell, Barry Potter and Desmond Morris