I do a 'big' shop for basics: tinned goods, cleaning stuff, flour, rice , pasta, tea, coffee etc. every 6-8 weeks or so anyway. I stack it away in cupboards and buy fresh goods on daily need basis. I have just done a big order for Monday delivery.. maybe I should go back and double it.. I have until 2:15 to amend the order!!
I do think some things will eventually be in short supply post Brexit. We will just all learn to readjust or pay higher prices and look back in tears to come on forums and say do you remember the good old days.....