The title refers to an expression that describes the portion of a whisky's volume that is lost to evaporation during the ageing process.
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.
The guide who shows the protagonists around the whisky distillery is played by Joy McAvoy. She is the sister of James McAvoy.
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.
Ken Loach's 11th film in 31 years to compete at the Cannes Film Festival. (Loach won the Jury Prize for The Angels' Share (2012).)
Charles MacLean, the whisky expert, is the genuine article and the only one of the cast to see the script in its entirety.
The film features the 'acting' of two former Dundee United football players - Charlie Miller (one of Leonie's uncles) and Andy McLaren (the father of Robbie's assault victim at the meeting).
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.
Ken Loach described this film as a fable. Despite its grounding in the very real privations of working class Glasgow, its heist plot is more than a little fanciful.