The last day of principle of photography was filmed on VE day. The gold commander in charge of Security for the event summoned director Chris Carr. He asked what the production was about and Chris explained they were making a spy film. He then replied: "I love spy films, go get on with it!"
During post-production, director Chris Carr developed an idea of a podcast series connected to The Dry Cleaner film in which he interviews intelligence professionals, authors and experts on the world of espionage and terrorism. The series is called The Dry CleanerCast.
In the film TV detective Nick Slaughter is mentioned by Lydia and later George. Nick Slaughter the name of the lead character from the TV show Tropical Heat which was also know as Nick Slaughter and Sweating Bullets. The star of the show actor Rob Stewart later discovered that his character had become an icon in Serbia and the phrase Slaughter Nick for President had became a slogan of resistance against President Slobodan Milosevic.
One scene from The Dry Cleaner was shot in Ballast Quay because of its impressive view of Canary Wharf. Ballast Quay has been used as a location in multiple films, including The Secret Partner featuring Bernard Lee who played the original M in the James Bond films.
Another scene from The Dry Cleaner was shot in Bishop's Gate behind Liverpool Street station. This location was also used in the James Bond film Skyfall and Jack Ryan Shadow Recruit.