Ned Dennehy (born 8 December, 1965) he is an Irish actor, who has appeared in British and Irish films and television.His most notable film role to date is Tommy in Tyrannosaur. He has also appeared in Blitz, he played Alderton in Harry Potter and the Deathly Hallows, - Part 1 and the independent British feature film Downhill.His television work includes RTÉ's Damo and Ivor and BBC dramas Parade's End, Luther, Peaky Blinders, and the Leading role of Letters Malloy in Banished and Dickensian.