Rik Mayall also appeared with Brian Glover in An American Werewolf In London.
Richie and Eddie deduce incorrectly that Rottweiler's kitchen is opposite their lower landing wall, it's actually his bedroom. But Richie and Eddie should know that already, when they ventured out onto the window ledge and saw into Rottweiler's room, adjacent from their kitchen.
When discussing about disconnecting their illegal gas connection. Eddie tells Richie that the time is 6:15PM and that have until 9AM the following morning to disconnect the illegal gas connection, which Eddie miscalculates as 4 hours/27 minutes. It is actually 14 hours/45 minutes. That means Richie and Eddie have under 15 hours to disconnect the illegal gas connection.