We've just got renewed restrictions here, although possibly a little too late, going by the leap from 2k cases per day to 3k cases per day to suddenly 6k cases per day. Differing rules in England, Scotland, Northern Ireland and Wales, but in England they've restricted it to only meeting up to 6 people from outside your household.
Hardly anyone ever twigged that they were still supposed to be maintaining 2m distance anyway (or 1m plus mask, limited period of contact etc) from everyone not in their household or social bubble. That requirement never ended. So everything went relatively smoothly for a while, while case numbers were a little bit lower and there was less chance of someone infected being in these multiple contact situations. But as soon as you throw a handful of infected people into that situation (especially people who've been partying hard on holiday), the virus spreads like crazy and case numbers rocket. Pretty much a repeat of what's happening in a lot of other places, but I think it's going to take weeks or even months to bring under control again without something a lot more drastic, like closing pubs and restaurants down again, or staggering classes and bringing in home-based lessons to restrict the number of kids in schools at any one time. Too many schools were overcrowded anyway.
Someone I know through FB is currently unwell with Covid. One of his kids came down with it first after a kid in her class was sent to school with 'just a cold'. Whole family and ex's family are now sick. The guy I know has had the whole raft of symptoms, and seven days in has started with breathing problems.