Because of Wayne/Gary Holton's premature death, a number of scenes had to be rewritten. Most of these were Spanish interiors later on, but even in this episode, Wayne doesn't appear in a couple of scenes, e.g. the Portland.
In-joke: Neville (Kevin Whately) complains to Dennis that "no wives" were to come to Ally's house. Dennis points out Christine is his girlfriend, not his wife. (Christine is played by Madelaine Newton, Kevin Whately's real wife).
Newcastle has a famous Chinatown noted for its restaurants, which is probably where Wayne and Barry headed.
Sammy Johnson, who played Martin, the thug that has a run in with Moxey and Oz in the nightclub, costarred with Jimmy Nail in Crocodile Shoes. Johnson passed away in 1998 due to a heart attack, aged just 48.
The snooker game between Barry and Oz was the first scene to be shot following the death of Gary Holton.