Morrisons offer priority ‘Doorstep Delivery’ of essential items to the elderly/isolated. Details can be found at https://my.morrisons.com/doorstep-deliveries/ or by calling 0345 611 6111 and selecting option 5
Asda are offering an essentials 'cupboard food filler' box costing £30 with free delivery. More details and to order: https://foodboxes.asda.com
Marks and Spencer are offering different essentials boxes, starting at £15 for a mixed vegetable box. More details and to order: https://www.marksandspencer.com/l/gifts/food-boxes
The main supermarkets (Sainsbury, Tesco, Waitrose, Asda etc) online delivery slots are busy but available in advance if you persist. However, there are some priority slots allocated for over 70s so do check online or on the phone to see if you are eligible.
However, if you fall within the ‘extremely vulnerable’ group (see details at www.gov.uk/coronavirus-extremely-vulnerable) you are definitely entitled to a priority delivery slot.
Some of the supermarkets have already singled out persons they deem vulnerable and self-isolating e.g. Waitrose Whetstone, Waitrose Mill Hill has a click and collect service and will put your shopping in your car boot for you
Deliveroo is in partnership with M & S, Morrisons, Co-Op and a few local independent convenience stores for delivery of essential products (depending on availability). This can be done via the app or online at https://deliveroo.co.uk/
Money Supermarket has released this information regarding when each supermarket is releasing their online shopping slots: