Riz Ahmed as Omar

Nigel Lindsay as Barry

Kayvan Novak as Waj

Adeel Akhtar as Faisal

Arsher Ali as Hassan

Preeya Kalidas as Sofia

Benedict Cumberbatch as Negotiator

Julia Davis as Alice

Craig Parkinson as Matt

Wasim Zakir as Ahmed

Mohammad Aqil as Mahmood

Karl Seth as Uncle Imran

Waleed Elgadi as Khalid

Alex Macqueen as Malcolm Storge MP

Shameem Ahmad as Chairwoman

Jonathan Maitland as Newsreader

Marcus Garvey as Marathon Policeman

Darren Boyd as Sniper

Kevin Eldon as Sniper

Adil Mohammed Javed as Nabil

Toby Longworth as Heimlich Man

Danny Ashok as Phone Shop Assistant

Will Adamsdale as Alex

Mark Morrell as Security Guard