Thanks, Ilona! I went on Sainsbury's website yesterday and the advice was to register for the government's list of vulnerable people and then that list would be passed on to Sainsbury's. There was a link to the place to sign up to the government link. However there is a quite restricted number of reasons, which do not include age or most disabilities, and you have to give your NHS number. I am not clear how this is going to work. I think a belt and braces approach would be to do both, assuming you meet one of the government's criteria for registering. I think there are going to be major problems with food supply soon, despite government reassurances, so probably best to register ASAP. ETA: Phoned that number, but they basically said to try again on Monday when more delivery slots would be available. I had to wait 20 minutes to speak to someone, which was a lot less than I expected.