Trailer
Cast
Stephen Dillane
Viscount Halifax
Adrian Rawlins
Air Chief Marshal Dowding
David Strathairn
President Roosevelt (voice)
Bethany Muir
Sarah Churchill
Jeremy Child
Lord Stanhope
Olivier Broche
Reynaud
John Atterbury
Sir Alexander Cadogan
Bronte Carmichael
Young Girl on Tube
Richard Glover
Brigadier Nicholson
Steffan Donnelly
Back Bencher
Kristin Scott Thomas
Clemmie
Nicholas Jones
Sir John Simon
Joshua Higgott
Reporter
Kieran Buckeridge
Cecil Beaton
Paul Leonard
Admiral Dudley Pound
Robin Pearce
Ernle Hastings
James Eeles
Maurice Baker
Flora Nicholson
Jessie Sutton
Tom Ashley
Ramsay Staffer
James Harkness
AD Nicholl (Secretary #1)
Sarah Flind
Cook
David Schofield
Clement Atlee
Demetri Goritsas
Cabinet Secretary Bridges
Hannah Steele
Abigail Walker
David Bamber
Admiral Ramsay
Ben Mendelsohn
King George VI
Hilton McRae
Arthur Greenwood
Brian Pettifer
Lord Kingsley Wood
Michael Bott
Equerry
Pip Torrens
BBC Producer
Charley Palmer Rothwell
Christopher Wilson (Photographer)
Lily James
Elizabeth Layton
Ronald Pickup
Neville Chamberlain
Samuel West
Sir Anthony Eden
Joe Armstrong
John Evans
Jordan Waller
Randolph Churchill
Roisin O'Neill
Agnes Dillon
Gary Oldman
Winston Churchill
Michael Gould
Lord Londonderry
Philip Martin Brown
Sawyers
Anna Burnett
Pamela Churchill
John Locke
Oliver Wilson
Imogen King
Teenage Girl at Tube Map
Faye Marsay
Sybil
Eric MacLennan
Tom Leonard
Mary Antony
Mary Churchill
Benjamin Whitrow
Sir Samuel Hoare
Edmund Wiseman
Actor
Joshua James
W D Wilkinson (Secretary #2)
Malcolm Storry
General Ironside
Patsy Ferran
Maid
Richard Lumsden
General Ismay
Mario Hacquard
Daladier
Nia Gwynne
Alice Simpson
Paul Ridley
House of Commons Speaker
Johnny Otto
Member of Parliament (uncredited)