Operation Mincemeat itself was a successful 1943 deception operation, designed to convince the Nazis that Britain would invade Greece rather than Sicily. The result of this deception would be that the Nazis would move their resources to Greece, enabling the Allies to invade Sicily with little to no resistance. The deception method used was quite unique. Two British spies Ewen Montagu (Colin Firth) and Charles Cholmondeley (Matthew Macfadyen), working alongside Jean Leslie (Kelly Macdonald), obtain the body of a homeless man, stash faked secret documents on it, invent a personality and background for him and have him wash up on a Spanish beach.

Though occasionally undone by its Sunday-teatime tendencies, this is a spirited and gently entertaining slice of wartime espionage, with sharp, wry performances from the ensemble cast.
This was a good film overall, the performances were solid and the two former Mr Darcy’s were a formidable team. The tension of the operation was well presented. I was not fond of the unnecessary and fruitless love triangle which distracted us from the main plot. Also there were two instances of gratuitous suggestive action on the part of a British double agent in Spain. These were totally unnecessary and rather put me off.
This is another of the “home front wartime” Britfilms, such as Munich: The Edge of War, Their Finest, The Imitation Game and Darkest Hour, all probably inspired by the Oscar-winning success of The King’s Speech, which have their emphasis on domestic morale, strategic ingenuity and political shenanigans, rather than battlefield action. Operation Mincemeat is watchable enough, but perhaps can’t find a fictional way into the stranger-than-fiction outrageousness of the scheme itself. Guardian
Overall however, this is a comfortable film, with excellent costuming, solid performances and wonderful set design. See the trailer below: