Harry Enfield states on the commentary that during the scene where Sharon climbs into bed with him at the end of the party, that was the first time he'd put his tongue in the mouth of another woman since he'd been married.
The scene where Kevin and Perry are scrubbing Eyeball Paul's floor had to be shot quickly because Rhys Ifans had to get on his flight to America to film The Replacements.
When Kevin and Perry hit the town and see German men marching. The lead German is played by Director Ed Bye.
James Fleet who plays Kevin's dad in the movie, actually played his school teacher in Harry Enfield and Chums.
The first time Perry is seen (in the shot before they buy the porno mag), Kathy Burke doesn't move her mouth much. This is because she was suffering from horrific toothache and left set early that day to see a dentist.