Director: Dexter Fletcher Starring: Peter Mullins, Jane Horrocks, George MacKay, Antonia Thomas, Kevin Guthrie, Freya Mavor, Jason Flemyng Written by: (based on his stage play) Stephen Greenhorn Running Time: 100 mins Cert: PG Release date: 4th October 2013 Who would have thought that a musical based on the songs by Scottish band, The Proclaimers, and…