London is high risk
It's just as well we got our visit done last week, because London is now high risk. You must not meet socially with friends and family indoors in any setting unless you live with them or have formed a support bubble with them. This includes private homes, and any other indoor venues such as pubs and restaurants.
We can meet outdoors, in a group of 6 or less (including children). But it isn't summer now, and if it rains, it's going to be pretty miserable. And it'll get colder as winter draws on.
But just look at the numbers. 138 new deaths, and 18980 new infections Thursday; a similar number the day before with 137 new deaths and 19722 new infections.
We're not in London; our area is still "medium risk", but I think that's only a matter of time.
So, we hunker down.
I've been taking 2000 IU of vitamin D each day. I'm going to start taking 15mg of zinc supplements. They cost £1.50 for 60 from Waitrose, and they're one of the things they gave Trump. I did a bit of research, and being low on zinc does make it worse. I don't know if I am low on zinc, but for 2.5p per day, it seems like a sensible precaution. The recommended dose is 11mg/day, so 15 is about right.