Jamie Bell as LCpl. Rusty Firmin

Abbie Cornish as Kate Adie

Mark Strong as Max Vernon

Martin Shaw as John Dellow

Emun Elliott as Roy

Ben Turner as Salim

Aymen Hamdouchi as Faisal

Tim Pigott-Smith as Home Secretary William Whitelaw

Robert Portal as Lt. Col. Mike Rose

Colin Garlick as LCpl. John Mac

Andrew Grainger as Ray

Martin Hancock as BBC Cameraman Bill

Colin Moy as Maj. Hector Gullan

Toby Leach as PC Trevor Lock

Xavier Horan as SAS Soldier Tom Morrell

Te Kohe Tuhaka as Tak

William Chubb as MI5 Spokesman

Ronan Vibert as MI6 Spokesman

John Henshaw as Metropolitan Police Spokesman

Tim Downie as Jimmy

Sam Snedden as Sim Harris

Mia Blake as Betty, Max's Wife

Matthew Sunderland as Tom Lovett

Emma Campbell-Jones as Whitelaw's Aide

Jared Turner as Sgt. Tommy Palmer

Calum Gittins as Tommo

Ryan O'Kane as Snapper

Fayssal Bazzi as Makki

Kenneth Collard as Clive

Michael Denkha as Mustapha Karkouti

Nicholas Boulton as Chris Cramer

Martin Hancock as Bill

Scarlett Featherstone as Max's Daughter #1

Venice Harris as Max's Daughter #2

Marjan Gorgani as Lead Interpretor

Jeff Szusterman as Intelligence Translator

Phil Peleton as Intelligence Officer

Kip Chapman as Trevor

Ajayshri as Caretaker

Scott Michael Wagstaff as PC Walker

Brady Powell as Irish Policeman

Jay Sutherland as Policeman #1

Joel Beckett as Policeman #2

Alan B. McElroy as Policeman #3

Dominic Hughes as Paramedic

David Rumney as Signaller

Robert Hartley as Army Technician

Eric Colvin as OB Technician

Sara Stone as Zahra Zomorrodian

Simon Elrahi as Imam (uncredited)

Glen Levy as Jerry (uncredited)

Ghazaleh Golbakhsh as Nooshin (uncredited)

Andrew Lawrence as SAS Van Driver (uncredited)

John Ramm as Tony Crabb (uncredited)