I agree with Strides. In my view, the only “side” area of Fulham’s ground that could be used in the episode is the Riverside Terrace. From a few football grounds books that I have that contain old photos, there isn’t one with a roof/stand like that at Craven Cottage on the riverside. Apparently, the Riverside Terrace was not roofed until April 1972 (the Eric Miller stand). Even then, the roof was (and still is) completely different to that shown in the episode. The roof in the episode appears to be more of an old-fashioned roof completely different the current 1972 roof. I could be completely wrong, but this has been bugging me for some time. I have looked at lots of old photos of London football grounds and I am completely lost with this one.
In my opinion, Griffin Park was definitely not used in Ringer, and it was also not used in Golden Fleece. I’m pretty sure that Twickenham was used in Golden Fleece:
On the subject of football grounds, it’s a bit off the subject, but the ground featured at the end of the Porridge episode “Happy Release” was Loftus Road (as featured in I Want The Man) and not Elland Road as the episode made out:
Porrigde episode “Happy Release”:
“I Want the Man”: