A returnable format is the Holy Grail that all factual and entertainment TV programme makers are searching for. But where does the inspiration come from and how do you build and develop them? This is a recording of a masterclass from the BBC Academy’s Fast Train North event held on 20 November 2012. The BBC Academy’s Hilary Rosen is joined by Tom Edwards, commissioning executive producer for features and formats for BBC One and BBC Two, Gill Tierney, executive producer for BBC Television whose credits include Coast, Gardeners World and Sam Lewens, an executive producer who has worked on Dragons' Den and BBC Three's Young Talent of the Year.