Hazel Marshall and guests discuss how to write sitcoms. With John Finnemore, Jon Plowman and Tira Shubart. John Finnemore writes and stars in the award winning Cabin Pressure on Radio 4. Tira Shubart wrote the critically acclaimed BBC Two sitcom Taking the Flak. Jon Plowman has an extremely illustrious comedy background, exec producing Absolutely Fabulous, The League of Gentlemen and The Thick of It amongst many more comedy classics.