First time actor Paul Brannigan was, like his character, a former prison inmate. He met Paul Laverty when the screenwriter was visiting various youth centers to get an idea of how young people in Scotland felt and spoke.
Paul Brannigan very nearly didn't appear in the film as he failed to turn up to the first casting session. Brannigan was going through a lot of personal issues at the time and eventually came on board after writer Paul Laverty tracked him down.
All the interior parts of the distillery scene were filmed in the Deanston distillery (as it's noticeable by the staff outfits), but the exterior shots of the arrival and departure were actually taken at the Glengoyne distillery.