"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.
The house interiors were sets built in a studio, the exterior was entirely computer-generated.
All of the appliances in the house are by German brand Miele. Miele is the Italian word for honey.
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.