I've just read another set of posts about buying one of the 'growing tents' for use as a darkroom.
The poster is in the US, but bought off Amazon, so you might want to make contact to ask about the brand and search words used...?
https://www.photrio.com/forum/thread...rkroom.187199/
Terry S
P.S. Just found out by just typing 'grow tents' into the search bar at Amazon UK and you'll get loads...