I think that is a wise move, cans of beans, pasta maybe some flour and milk ( to put in freezer) , The Great British Public WILL panic in the same way the Chinese public did that is for sure. I always remember long ago going to the big Co-Op ( now Morrison's)by Worthing station straight after work to get a couple of tins of Cat food and some milk and the place had been stripped of several things, there was no milk, fruit and veg or frozen chips and veg because earlier in the day a weather report said a Big Freeze was due which could last 10days !
I'm not sure the correct response to the potential for panic buying is to panic buy.
I have a friend, a staunch remainer, who has a cupboard full of unwanted cans of basic crappy food because she panic bought thinking no deal Brexit would happen at the end of October. Cans she no longer needs and that cannot now be bought by people on a budget or donated to food banks.
And that's really my entire point. The current response of some people IN BRITAIN at THIS TIME is entirely disproportionate. Panic buying will disadvantage anyone who is unable to get to the shops. Calling off sporting events at the drop of a hat will worry children and those of a nervous disposition who may be attending them this weekend. Sending the stock market off a cliff could have reprocussions that will last for a decade and lead to more austerity that could kill hundreds of thousands. All for a disease with a 1-2% mortality rate.