I have become interested in modern UK Royal Mint coins. They put out a LOT of stuff and many in very limited mintages like 5000. Are there any dedicated (or partially dedicated) forum-type or news/blog websites out there? No knock to CoinTalk but it does cover everything
You could browse around here, I suppose. It's just a site I stumbled across a while ago. I haven't used it much but it seems to present a lot of data well.
I believe the Silver Forum is from the UK and has threads that might appeal to you https://www.thesilverforum.com/
Thanks for the mention of Online Coin Club, @lordmarcovan The pre-decimal part of the UK section leaves much to be desired, but I think I have not missed any coin and the list should be comprehensive from 1801 up to the newest issues.
I gather you have something to do with that site? I was looking for specifications on a modern UK bullion coin recently and stumbled across it. Was impressed with the depth of information provided.
CCF has a UK section: United Kingdom (Great Britain) Coins https://www.coincommunity.com/forum/forum.asp?FORUM_ID=36