I'm Sorry I Haven't a Clue pause in the middle of speaking, a reference to Radio 4's other long-running panel show "Just a Minute". (Likewise, occasionally on "Just a Minute", a panellist will make a challenge of "Mornington Crescent".) Chairman Jack Dee frequently pokes fun at "Just a Minute", particularly its chairman Nicholas Parsons, whom he mimics in constantly emphasising the long experience of some panellists, and the fact that the programme can be heard all over the world. The programme has won the Gold Sony Radio Comedy Award three times: Other awards: "Clue" has been broadcast since 11 April 1972 on BBC Radio 4 with
I'm Sorry I Haven't a Clue elbow". More puns are found in the "Arrivals at the Ball" section, of the form "Mr and Mrs X and their son (or daughter)..." the child's name forming a pun, preferably laboured and feeble. This grew out of the "drama" section of later shows in the "I'm Sorry I'll Read That Again" series, for example, at the Criminals' Ball, "Mr and Mrs Knee, and their Swedish son, Lars Knee". According to Tim Brooke-Taylor twenty per cent of the show is ad-libbed. According to Willie Rushton, it is more like fifty per cent, but he didn't think that a bad thing.