Overview: The A&E doctors return to the show as the best brigade of the series. Slaughtered pigs Trinny and Susannah also make a reappearance - served up in a recipe of roast loin and belly of pork. Gordon travels to Scotland in search of his grandfather's butcher shop, while Little Britain's David Walliams takes on Hugh Fearnley-Whittingstall and Janet Street-Porter in the recipe challenge.