I just noticed that the place where I asked for more details about the UK release (
https://www.facebook.com/ukcriterion/) isn't actually an official channel. As far as I can see, there is no official site or news feed for Criterion in the UK. If anyone knows of one, please point it out. In the meantime, I've done a little detective work.
Currently, the most detail about the UK release can be found on the Zoom product page:
https://www.zoom.co.uk/product/godzilla ... on_blu_rayThis is a word-for-word duplicate of the product information on . The question is whether Criterion sent that product description to Zoom, or whether they just sneakily copy-pasted it from Criterion's site for the US version. Zoom's photo is of the US version, since it doesn't have even a preliminary mockup of a BBFC classification. That's not unusual, but also doesn't offer any evidence for Zoom not just grabbing the photo from Criterion's page. The Amazon UK product page similarly just has photos of the US version for now.
I had a look at the BBFC website, but none of the movies have been classified yet. That would be the place to check for the runtime of King Kong vs Godzilla, for example.
So the conclusion is currently...inconclusive.
EDIT: I've just emailed Criterion directly to ask about the details of the UK release. I'll report back if they reply.