The Saturday interview: David Frost

How did David Frost, who was a preacher before he became a TV satirist, achieve one of the scoops of the 20th century?This office wouldn't be much of a challenge for Through the Keyhole. The walls are plastered with photographs of David Frost chatting to stars and statesmen ? Bobby Kennedy, Sammy Davis Jr, George Bush Sr, Bill Clinton, Paul McCartney and George Bush Jr and we've barely started.