Gourmet Night (a.k.a. Gourmet's Paradise) - S1-E5
Continuity mistake: There appears to be a very obvious splice edit in this episode. When Basil manages to get Kurt off him after being pinned to the kitchen table, he pushes Kurt against the wall knocking him out. Before this Basil is lying flat on the table and we never see him get up to a standing position beforehand.
Gourmet Night (a.k.a. Gourmet's Paradise) - S1-E5
Continuity mistake: When Basil goes to fetch the branch to give the car a thrashing after it breaks down, the car manages to move onto the pavement all by itself.
Gourmet Night (a.k.a. Gourmet's Paradise) - S1-E5
Continuity mistake: When Basil is driving home the second time, he is turning into a street where a van is parked. When he turns the street is dry. In the next scene where he is backing away from the van, the street is all wet.
Gourmet Night (a.k.a. Gourmet's Paradise) - S1-E5
Continuity mistake: When Basil's car breaks down for the final time after reversing away from the van, watch closely on the garden path of the house right next to the car. The garden gate is open, and you can see it swing shut (look at the black shape just above the hedge) just as Basil says "One, two three." The gate was shut when he first reversed around the corner, but was open again after the shot cuts back to the car (after it's moved to the right along the pavement).
Gourmet Night (a.k.a. Gourmet's Paradise) - S1-E5
Continuity mistake: When Manuel fetches Basil from outside, Basil enters the building first in the exterior shots, but Manuel gets to reception first in the interior ones. (00:01:30)
Answer: It's "Leisure Complex" by Dave Gold and Gordon Rees. Can be found on YouTube. The relevant clip is around 25 seconds in.