The flashback when DeVoe and Marlize are having a picnic, the Mini in the background has a British registration plate from the back of the car on the front. UK registrations are white plates on the front and yellow on the rear of the vehicle.
When the DeVoes are moving into their new home Mrs DeVoe opens a book where its written Promulgations of our Future. Unless he is planning to air their future plans to the general masses this is the wrong word which as intelligent as Clifford is he would never use this word wrong.
In addition to being yellow the Mini's registration plate indicates it was 1st registered no earlier than Sept 2008 (As shown by the BY58 prefix).
This model vehicle stopped production in Oct 2000 and the last ever registration was in December 2001.
UK regulations prevent a plate being applied to a vehicle that implies it was 1st registered later than it actually was.