Johannes Roberts Director Noel Clarke Charlie Actor, Screenwriter, Producer Colin O'Donoghue Mark Actor Antonia Campbell-Hughes Shelley Actor Laura Haddock Nikki Actor Jamie Thomas King Chris Actor Alex Price Jake Actor Ned Dennehy David Actor Geoff Bell Bob Actor Ruth Gemmell Ruth Actor Davie Fairbanks Greg Actor, Screenwriter Amy Louise Pemberton Lucy Actor Marc Small Screenwriter Steve Cook Producer Manu Kumaran Producer Roslyn Hill Producer Marcus Campbell Sinclair Producer Christian Henson Original Music Tim Sidell Cinematographer Martin Brinkler Film Editing Colin Jones Casting Gail Stevens Casting Malin Lindholm Production Design Stuart MacKay Art Director Andy Blake Costume Design Molly Emma Rowe Costume Design