Colin Firth as Mark

Robert Carlyle as Robert

Anne-Marie Duff as Michelle

Nicholas Burns as Michael

Emilia Fox as Laura

David Oyelowo as Yemi

Julia Davis as Sally

Emily Woof as Sandra

Peter McNeil O'Connor as Hostel Manager

Charlie Creed-Miles as Man in Hostel

Megan Dodds as Anastasia

Toby Kebbell as Beggar 2

Gugu Mbatha-Raw as Girl at King's Cross Station

Nikki Amuka-Bird as Itshe

Nichola Burley as Zoe

Alan Mandel as Thug

Pearce Quigley as Beggar 1

Gemma Barrett as Danielle

Anne-Marie Bossman as Adanna

Marguerite Fontaine-Anselm as Housing Officer

Antonio Pelayo as Kitchen Cleaner

Maz Albrecht as Self

Joanne Adams as Shop Assistant

Ria Haydon as Midwife

Catherine Raingold as Social Worker

Laurence Richardson as Police Officer

Toni-Ann Walker as Taxi Driver

Chris Wilson as Police Officer