I am not a prepper but I was in Tokyo during the Tohoku earthquake and I have seen, first hand, just how quickly shelves empty after a disaster.
I also happen to know more than a little about the things that I talk about below.
That was in Japan where people are, in general, far more reasonable; and decent than in the UK. You know damn well that there are certain sections of scoiety in the UK who will turn feral as soon as anything happens and looting of supermarkets is an absolute certainty.
However, given that most people are not in the slightest bit prepared then I suspect that those 'certain sections of society' will be much, much, wider than you might imagine. Remember, we are only 9 meals away from anarchy - that is not an exaggeration.
Anyone who has been paying attention will have seen that relations between the UK and Russia have severely deteriorated. You will also have seen that hybrid ('gray zone') warfare is already underway. We might not be shooting at each other but Russia is repeatedly provoking European nations in both the cyber and the physical realms.
The United Kingdom IS on Putin's naughty list and the chances of some sort of action against are very high at this point. Very high.
Whilst some sort of deniable direct action is possible (already happened in 2024 at Cromwell Industrial Estate in London) I think the most likely attack will be in cyberspace. Imagine your bank cards, credit cards and ATMs not working for a week, or your electricity being turned off.. Where do you think your food will be coming from if you can't go shopping and you are not willing to risk run-ins with the ferals who are already running riot through their local Tesco?
FAR too many people are turning a blind eye to this and if you think that having three days supplies in the house is some sort of prepper overkill then you are doing yourself, and your family, a massive disservice.