"The oldest E-Type Jaguar" was made for the movie from a replica; Rowan Atkinson bought it at the end of the film.
Trevor's choice of dessert is a cherry bakewell, an homage to the "Mr. Bean" episode The Trouble with Mr. Bean (1992), in which Bean has a cherry bakewell before being attacked by a bee.
All of the appliances in the house are by German brand Miele. Miele is the Italian word for honey.
The house interiors were sets built in a studio, the exterior was entirely computer-generated.
Rowan Atkinson said he enjoyed the screenwriting process, but disliked the filming process. He said it was very stressful due to Covid 19. A crew member got Covid, and Atkinson had to isolate for two weeks.