Where do you get the idea that there's a food shortage?
Look, there's a problem with crisps and snacks at the moment because of a fire at the Walkers plant. For some reason New York Bagel Company onion bagels are vanishing rapidly, although there are tons of the other flavours. There was a brief problem with petrol largely caused by idiots in gas-guzzling 4x4s panic buying.
Anything else is due to the French being spiteful -and what else can one expect from that lot- and capitalist bastards who'd rather cut their own throats than pay a decent wage!