Set in 1943, the film follows two brilliant intelligence officers, Ewen Montagu (Colin Firth) and Charles Cholmondeley (Matthew Macfadyen) who conceived a plan that was dubbed Operation Mincemeat.
They would trick the Nazis into thinking that Allied forces were planning to attack southern Europe by way of Greece rather than Sicily. Their plan was to get a corpse, equip it with misleading papers, then drop it off the coast of Spain where Nazi spies would take the bait.
In Cinemas May 12
This competition has now closed. Thank you to everyone who entered.