1/3. The veteran journalist and former Labour MP Brian Walden talks about the highs and lows of his political career. This first talk focuses on Enoch Powell's "rivers of blood" speech in 1968. Walden recounts what Powell told him about it and what Willie Whitelaw subsequently confided: "Treachery, sheer treachery, dear boy. He never said a word in shadow cabinet - then goes off and shames us. It's a disgrace."

(Repeated from Sunday at 10.45pm)