The UK is not vaccinating kids under 18 because of limited vaccine stock, not from medical reasons. It is true that minors are less likely to have a severe response to COVID, hence triaging that the youth do not get vaccines. But teens and children can catch COVID, transmit and pass on COVID, be hospitalized for COVID and even die from it. (just not at same rates as adults/elderly/people with comorbidities).
I personally think that people in general should go back to some social distancing. NO ONE wants to do that, including me. Anyways, I have gone back to wearing masks in stores, wearing mask at the Y except when swimming, and eat outdoors versus indoors. I understand I am still taking a risk to get infected.
One thing that I was doing during COVID other than having just 1 other family distanced with, is to space any close social get togethers by a week, so if I had symptoms or other people developed symptoms I wouldn't infect a bunch of people during that initial period. I haven't been doing that, but I'm mulling it over.