Thanks wstol...
Yes, Curry and Chips was written by Johnny Speight, but I have always assumed that Spike had a bit of influence in the writing. I'm will be trying to differentiate between controversies that were contemporary with the show, and those that have occurred since due to later changes in tolerance, etc. This was definitely (one of a few) that was controversial at the time.
Not seen Bottle Boys yet, but coincidentally Asquith was in an "Inside No 9" recently.
If "Up the Elephant and Round the Castle" was so bad, how did it last 3 series, 23 episodes?!
These questions, and more, will - hopefully - be answered, at some point!