Johnny English: Do you or do you not have tattooed on your bottom the words "Jesus is coming, look busy"?
Archbishop of Canterbury: Are you insane?
Johnny English: Well, let's find out, shall we?
When Pascal's henchmen infiltrate Buckingham Palace, and force the Queen to abdicate, if you look very closely on the abdication document it is dated the twentieth of March 2003. Yet in an earlier scene where Johnny English is photographed by the speed camera that has the date 21/03/03, obviously the abdication was filmed before the car chase, and therefore the dates get mixed up.
The suit English is wearing when he meets Agent One looks like the famous Mr. Bean costume that Rowen Atkinson is famous for.