Thirty years ago, a low-budget British film exploded onto screens. Trainspotting was dirty, funny, heartbreaking and utterly original. Before the screening, producer Andrew Macdonald, now chair of the Edinburgh Film Festival, talks to costume designer Rachael Fleming about how they brought Irvine Welsh's world to life and the film’s legacy for today’s filmmakers and audiences.  An exceptional commemoration of "Choose life", Ewan McGregor and Spud thirty years on.  Over 18s only. This is not about trains.