I managed to get a delivery about a week ago, for yesterday morning at ASDA. I think it must have been a cancelled order which opened the slot up for me, so I made the most of it and ordered £90 worth of stuff to stock up the freezer/pantry. Only problem was that because of the obvious reasons, the driver isn't allowed in the building, so I had an awful lot of food to take up to my third floor flat on my own. Not a happy bunny.
I saw an evening slot open for next Thursday, so booked it and filled it with essentials. I know I may not need it, but I thought it was worth doing anyway, you don't know how frequent slots will be, and I can amend the order for what I actually need nearer the date.