BROADCASTS.com

In March 1976, the British prime minister Harold Wilson unexpectedly resigned. Wilson had dominated British politics for over a decade, and no-one could understand why he was stepping down. Witness has been talking to one of two journalists who Wilson summoned shortly afterwards to a series of secret meetings. What would he reveal?

(Photo: Harold Wilson on his way to Buckingham Palace to tender his resignation to Queen Elizabeth. Credit: Central Press/Getty Images)