For any new UK users to Lemmy, consider making an account over at Feddit.uk. It’s an growing instance with a specific community focus on all things UK!
I’m not a admin of that instance, but made my own account after Lemmy.ml became too slow to use and the difference is night and day, at the time of writing.
Clicking on these causes Jerboa to crap out for me. But as someone else pointed out if I click on community links via another users profile it takes me to the community where I can subscribe, even if it’s in another instance.
It looks to me like it isn’t in the list at the federation info maybe that’s why?