Some of Britain's most famous comedians have paid tribute to comedy agent and producer Addison Cresswell, who has died at the age of 53.
Mr Cresswell guided the careers of stars such as Jonathan Ross and Jack Dee and was regarded as one of the most influential figures in British comedy.
His production company Open Mike has been responsible for a number of popular TV shows such as Channel 4's Comedy Gala, Live At The Apollo and Stand up For The Week.
A spokesman said: "He leaves behind a proud legacy in his tireless charity work, initiating and organising the annual Channel 4 Comedy Gala in aid of Great Ormond Street Hospital."
Jack Whitehall, who was crowned king of British comedy earlier this month for his role in Channel 4's Fresh Meat, tweeted: