Joan Bakewell: Frost was an immaculate networker
1 September 2013 Last updated at 16:08 BST
Veteran broadcaster Sir David Frost has died at the age of 74 after a suspected heart attack while on board a cruise ship.
Fellow broadcaster Joan Bakewell told the BBC she had followed Sir David's career with some awe.
She described him as hyperactive, with enormous energy and a great sense of curiosity about the world.