As is often the way with costume designers, Stephanie Collie is something of an unsung hero. We will not reel off her entire back catalogue, but it does include South Riding (2011, TV), Telstar (2008) Peter’s Friends (1992) and perhaps most exciting of all, Lock, Stock and Two Smoking Barrels (1998). Now, anyone old enough to remember when Lock, Stock arrived will remember just what an incredible influence its Mod inspired costumes had on the world of fashion. You could not pick up a men’s magazine of the time without seeing some guy in slim trousers and a jersey polo shirt. Stephanie Collie invented this look, thus providing one of…