Since 2012 Compston has starred as DS Steve Arnott in the TV series Line of Duty. He has starred in the films Sweet Sixteen, Niceland (Population. 1.000.002), Tickets, Wild Country, A Guide to Recognizing Your Saints, Red Road, True North, Doomsday, Freakdog, The Damned United, The Disappearance of Alice Creed, Pimp, Donkeys, SoulBoy, Ghosted, 7 Lives, Four, How to Stop Being a Loser, When the Lights Went Out, Sister, Strippers vs Werewolves, Piggy, The Wee Man, Filth, The Legend of Barney Thomson, and Scottish Mussel. Compston won a BAFTA Scotland Award for Best Actor in a Feature Film for Sweet Sixteen in 2002.
