When Geoff is driving in the rain, the car is actually being pushed along because Reece Shearsmith cannot drive.
The League got the idea for the film when they were trying to write another film called "The King's Evil", but they were all suffering from writer's block. So they decided to make a film where the characters from the show discover that they're just characters in a TV show and their world is being destroyed because the League are quitting the show.
In the studio that the League are writing the new film at, there is a poster for the film Bean. Director Steve Bendalack would direct the sequel to that film which was Mr Bean's Holiday. That film features an appearance from Steve Pemberton.
Filming took place in Dublin, Ireland as it would cost far less (due to tax breaks) than in England, where the three TV Series were filmed.
The actors expressed a desire for Dr. Pea's laboratory to be turned into an Aurora-style model kit as merchandise for the film.