Jim Broadbent

Santa Claus

Rafe Spall

Steve

Warwick Davis

Sally

Jodie Whittaker

Alison

Stephen Graham

Barber

Joanna Scanlan

Ruth

Kit Connor

Tom

Joshua McGuire

Tony

Ewen Bremner

PC Finkerton

Hera Hilmar

WPC Boyle

Nonso Anozie

Knuckles

Perry Benson

Jimbo

Matt King

Brian

Bjarne Henriksen

Lars

Mick Walter

Entwhistle

Brian Bovell

Policeman

Simon Kunz

Ugly Sister

Graham Hughes

Buster Evergreen

Leigh Gill

Specs

Mark Del Amo

Hoarse Prisoner

Neil Ashton

Another Prisoner

Susanna Reid

Breakfast TV Presenter/Herself

Jon Snow

Channel 4 Newsreader/Himself

Daniel Barker

Radio News Reporter

Craig Garner

Elf (uncredited)

Nicholas Camm

Guard

Bernadette Windsor

Dolores