Supermarkets are quite a distance away and no car.
I rotate supermarket deliveries. Make the most of the new customer offers from Iceland, Morrisons, Waitrose, Ocado, Tesco, Sainsbury, etc. Also no Bother (new customer offer). Also Approved Foods. Get honey checkout voucher thing or pouch.
Order through Quidco cashback (save the cashback for Christmas). Some new customer offers are 10 per cent off.
Be careful of what time you order as some days are more expensive than others.
Try to restrict to 40 pound shop (or whatever is free delivery).
Only order what is at a decent price i.e. choose lowest butter price - one week, look out for lowest price for Nescafe or brand you like.
Example I bulk bought Iceland UHT milk - and Heinz tomato soup from Iceland. Beans from Approved Foods one week as they were cheapest. Pasta likewise.
If you rotate supermarkets you will find that after a month the one you started with will send you a ten or five pound voucher because they are missing your business!.