If you registered online as vulnerable, this is one of the key services you effectively signed up for. The RVS has vetted the hundreds of thousands of volunteers who can now shop, bring medication and chat about the current situation and any help you need as a vulnerable person.
volunteering.royalvoluntary...
Shout-out to Poopadoopy for this post on PMRGCAuk - and she has personally tested it: the service works! They are sitting waiting for requests for their assistance and you do not have to fight online for a slot at stupid o'clock.