Acclaimed political profiler Michael Cockerell tells the story behind his encounter with one of the grand dames of Westminster, the formidable Labour MP Barbara Castle. A female icon of the left, Castle stood out from the herd thanks to her unique charisma, steely nature and her ability to leave members of the opposition, let alone the opposite sex, completely tongue-tied. In her conversations with Michael she speaks openly about the two great love affairs of her life, and the man she was currently keeping an intimidating watch over, the newly elected Labour leader Tony Blair.