He has also appeared in Black Books, Green Wing, Toast of London and Psychoville.
His film roles include Dazzle (1999) as Bodkin, Pets (1999) as Mick and The Last Leprechaun (1998) as Finn Regan McCool.
In April 2006, Walter appeared in an episode of the ITV soap opera Emmerdale as bit-part character Billy Trotter, and in 2007 as Raglin, a troll, in the British film The Magic Door.
In 2010, he appeared in panto at the Alhambra Theatre, Bradford as one of the Seven Dwarves in Snow White.
[3] Before he became an actor, he was a drummer for Wild Oates, a three-piece band based in Huddersfield.