Our local Tesco:
1. Excellent queueing system outside store, well marked out, only so many allowed in at a time, one person per trolley if possible, trolleys cleaned by staff before each use.
2. One way system around store, store marked out in squares, follow my leader system.
3. Staff direct you to available checkout in orderly fashion, Perspex screen in front of checkout assistant, card payment preferred.
4. Exit store separately to queueing people.
The one way system makes it a slower experience, but feels as safe as possible, and well done to our local Tesco for being so well organised, efficient and helpful.