No delivery slots at all with any supermarket so far, despite registering as very vulnerable. High risk not due to diabetes but another condition which compromises immune system. Am relying on neighbour and community volunteer, who are wonderful. Also had a phone call from local council social services to ask if all well.
You just have to keep checking, I know tesco in particular are adding extra slots at different times, I looked yesterday and I could've got a delivery today but I already have one booked for the weekend, they are popping up fairly frequently where I live. I did have some success with Asda too, but they are now only showing slots for the next 7 days, all of which are booked up. If you're really in a pickle then Harvey and Brockless are now delivering nationwide with a minimum order of £40 (https://www.harveyandbrockless.co.uk/) they are a little bit pricey and you may not get everything you need, they only do food no other household items or anything, or if you're in certain bits of Yorkshire you can order from Delifresh (https://delifresh-ltd.myshopify.com/), they do a few household items. These are both normally catering suppliers though, not supermarkets
@Max68 - Have you tried, or considered hooking it up to a battery charger for a few hours, or overnight? If nothing else, that'd help prove the battery hypothesis.
You could then start the car, once a week say, just to keep it topped up, or alternatively, disconnect the then charged battery to minimise any losses?
Some cars have more than other draining the battery, if left standing.