I'm Sorry I Haven't a Clue down opportunities to work on it as he preferred to remain a listener. The official, authorised history of the show and ISIRTA, "The Clue Bible" by Jem Roberts, was published by Preface Publishing in October 2009. Humphrey Lyttelton, primarily known as a jazz trumpeter and bandleader, was invited to be chairman because of the role played by improvisation in both comedy and jazz music. In the first series Lyttelton shared the role of chairman with Barry Cryer but he made it his own (especially once Cryer replaced Cleese as a regular panellist) and continued as chairman until his death on
I'm Sorry I Haven't a Clue 1500-seat theatres within a week of being advertised. At least one recording for the spring 2006 series filled all its seats within three hours of the free tickets being made available, and the London recording of the autumn series in that year sold out in ten minutes. Although there are twelve "Clue" shows broadcast per year these are the result of just six recording sessions, with two programmes being recorded back-to-back. The show was recently voted the second funniest radio programme ever, after "The Goon Show". It has a large following among professional comedians such as Armando Iannucci, who turned