[Alf Stewart]

I know I’m late to the party, but just watched Ep 104 which is the final one with the blue background Bon the end credits. For some reason the STV version shows the cast and crew credits in frames, a few at a time, rather than scrolling. The original TX and UK Living repeat had the usual scrolling credits. Perhaps they had to be remade due to tape damage? I can’t think of another reason.

That's happened a few times. Seems odd but perhaps you're right and they've had to be hastily recreated.