2002 the release was created without cover art
2005 an edit added date “1976-11-08”, country “US”
2017 an edit added front,back, and medium cover art (appears to be UK cover art)
2019 an edit by a different editor added booklet cover art (appears to be US cover art)
2021 I added the following US release with all US cover art https://musicbrainz.org/release/06c43a65-0e3c-4ced-83d5-03ce9129fec9
Since tagging has used the old US release it may not be a good idea to convert it to UK.
Best I can think of is to create a UK release based on the UK art work (then put that artwork on it), and merge the two US releases.
I do not believe a made in UK medium would be on a US release back then.
I am not an expert on the Parlophone/Capitol Records releases.
You are more patient than me - creating another UK release and then merging the US ones is great.
Personally when something is a mess like this I am quick to adjust the whole thing to the next best Discogs release/covers I can find. Sorry everyone who tagged with it, but you were already getting the crappiest of data
If I have better art to hand, and a discID, then I create a GOOD new copy and mark the old one as low quality.
If bored I will then strip down the bad copies and make something good from them. It is common to find confused junk from the pre-NGS era and I am like @aerozol and think fixing the data to something clean is better than leaving a mess.
I tend to take a bias to making use of the best combo of artwork and adjust to fit, but will also check the RG to make sure I am doing something of benefit. It is hard to guess what a tagger was trying to do when adding it to their collection, but improving data is never a bad thing.