Matthew Macfadyen

as Paul Tibbenham

Naomie Harris

as Maggie Dunn

Paloma Baeza

as Irène Lloyd

Shaun Evans

as Andy Clark

James Frain

as Harvey

Elliot Cowan

as Gavin

Anton Lesser

as Stanley Hall

Paul Butterworth

as Roger

Derek Riddell

as Richard Loach

Ben Miles

as Jeremy

Jonathan Aris

as Bob

Peter Wight

as Neville

Crispin Bonham-Carter

as Charles

Pip Torrens

as MoD Official

Colin Mace

as Trevor

Charles Simpson

as Senior MP

Catherine Hamilton

as Activist Trade Secretary