My SAinsbury was very quiet, most people keeping well apart. (Apart from the idiots standing in front of the small supply of bacon discussing at length which packet to buy)
Supplies were OK except for:
loo rolls, none on shelves, but a pallet of 4-packs.
pasta - none
tinned stuff -scanty
meat - plenty of expensive steak, not much basic mince, more sausages than usual.
Constant announcements reminding you to keep distance, and only take 3 maximum, only 1 of popular items.
I did the magic checkout, not sure if it would have stopped me zapping more than 2 items
No queues at the regular tills, alternate ones open, so no need for customers to get too close.
The self service tills, and the zapper ones, were again, alternate ones only to maintain space, and I think the self service were card only. (The zapper ones are always card only)
The foreign currency was obviously closed, I think the lottery was closed, not sure about fags. The deli counters were closed, but they had made up bags of ham etc. to buy.
I was impressed, as it's normally bedlam in there. They usually work on the principle of closing tills, as soon as there is less than a 2 deep queue, just in case the checkout operator might be able to relax for a moment.