more ww2, this time ... DUNKIRK, 1958....
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When the troop ship taking the platoon home is bombed and sunk in Dunkirk harbor, the scene of the ship sinking is taken from
The Cruel Sea (1953), which depicts the sinking of H.M.S. "Compass Rose".
The command center used by Vice Admiral Ramsey (Nicholas Hannen) was the actual bunker used during the operation. It's part of a large underground complex beneath Dover Castle. It's open to the public. The balcony in the cliffs is visible from the ferry terminal below.
Sir John Mills was fifty-years-old at the time of filming. The British Expeditionary Force in France in 1940 were a professional army, not conscripts (conscription (the draft) only began after Dunkirk to recoup numbers) therefore, Sir John Mills would be beyond the retirement age for a soldier, and would have been considered too old even for conscription, the maximum age being forty-five. The only soldiers aged fifty or above would have been senior officers, not frontline soldiers, and certainly not Corporals.