But HOW can it work??
Who is going to get in the shopping for all those elderly house-confined as it seems that the delivery services are oversubscribed, and not everyone has a younger relative or friend with the ability and time to manage shopping for them as well as their own chores? Is Dominic Cumming or another special adviser going to nip round with loo rolls, pasta and baked beans?
I'd suggest - but don't know as a fact - that a system will be put in place where people who don't have anybody to shop for them will be able to contact an organisation (perhaps the local council) to register and become eligible for organised deliveries of shopping.
Likewise for the 'who' - and again I don't know as a fact - I'd suggest that a combination of council employees, volunteers, armed forces etc would be used to do the deliveries.
If a whole range of businesses and services are going to be shut down for the duration it is unlikely there will be a shortage of people able to do the relatively simple task of collecting a box of shopping from a depot or supermarket and delivering it to someone's front door.
I no longer work for a local authority, but when I did that was exactly the kind of thing that was thought about and planned for on an ongoing basis.
Therefore the local authority workers and civil servants that have that kind of planning as their day job will hopefully be reassuring the likes of Dominic Cummings that all is well and there is no need for them to leave the safety of No10 to deliver loo rolls and baked beans.