Shot by director John Madden (Shakespeare In Love) with a warm, golden hue that emphasises the nostalgia for British wartime heroism, Operation Mincemeat is at its most entertaining when depicting the military bureaucracy surrounding such endeavours. Watching upper-crust Brits getting stuff done with a minimum amount of fuss is always a good time.
Jason Issacs is clearly having fun playing a stern admiral and Simon Russell Beale makes an impact as Churchill in several scenes. This is all the more impressive considering how often we've seen that figure on screen lately.
But it's the interplay between Firth and Macfadyen (who've both played Mr Darcy to great acclaim) that the film successfully hangs on. Firth's effortless dignity bounces nicely off Macfadyen's more prickly character, who's got something to prove.
Johnny Flynn also shows up as a young intelligence officer Ian Fleming, who played a part in the creation of Operation Mincemeat, and who would of course go on to create the character of James Bond. He is often seen typing away, and there's an amusing running joke about Cholmondeley's exasperation with how everyone in military intelligence is writing a novel.
The grand deception at the film's centre can't help but have particular resonance in a time of information warfare, and it's remarkable to learn how so much relied on the secret actions of a few dedicated civil servants.
Cast: Kelly Macdonald, Colin Firth, Matthew Macfadyen
Director: John Madden
Running time: 128 minutes
Rating: M (Offensive language)
Verdict: Great performances elevates a solid espionage drama.