Thank you for all you helpful replies.
I am trying to be very careful within the limits of also staying sane, as I am newly living on my own, and if I became ill I know that my DDs would want to look after me - and I would not want them putting themselves at risk. They have been through enough this year.
I went to my friends and enjoyed a walk round their stunning garden - and had a drink of water. He is a doctor so I knew he would have observed proper hand hygene.
I have also been asked to a garden visit with two other friends tomorrow and Thursday - what a mad social whirl!
What is a reasonable minimum spend for an online grocery delivery??