On the first day of shooting outside, Crispian Belfrage smoked 17 cigarettes in 8 hours.
The manor shown in the film is Stansted House.
The telephone seen in the phone used by Crispian Belfrage's character is an 100-year-old genuine antique used by Winston Churchill.
Both the producer and director had cameos within the film. The director, Olly Howland plays the third soldier in the war scene (under the fake name Otterly Haven) and the producer, Ceri Sims plays a party guest at the engagement party.