I don't think this has anything to do with the UK government's stance on Covid. It is more about what individual clubs do. If I were running the club, I would have very strict guidelines regarding vaccination and masking and extend them to outside the pitch/training ground for the players and the staff. And I would test the bejeepers out of them every day. When you come to training, you come 20 mins early and do an antigen test. At the end of training, you do an antigen test. Every fudging day. You do anything indoors? You wear a mask. And not just any mask: a properly fitted N95 one.
On the pitch when there is a stoppage, you keep your distance from the ref and other players. I'm appalled when I see players talking to the ref or opposition players within inches of their faces. I would even explore the possibility of having them play wearing high quality sports masks. Apparently, after an initial adjustment period, which could be when they're training, there's no appreciable impact on performance. Basically, I would make damn sure they didn't even catch a sniffle.
But unfortunately people think that, because they're vaccinated, all of a sudden we have beaten the virus. The only way to beat the virus is to stop its spread. Vaccines alone are not enough. You need to mask, mask, mask. Don't let others breath your air and don't breath others' air. If the entire planet did that for a few weeks, this thing would be over.