Regardless of what happens I've been converted to prepperism or what's known as "how they shopped and stored food before shops opened 24/7 and supermarkets delivered."
My nana had a great pantry because it had a sweet jar. She also had a well stocked bar 
When I was little mum shopped monthly at the supermarket and bought fruit, veg, meat and fish locally. We had a greengrocers van that came round when I was very young. Then we moved to the country and we went to the farms for veg a lot of the time. 20p for a cauliflower was extortionate back then, I remember dad thinking it scandalous. Signs along the road advertising Cheshire's (potatoes) for however many pence a pound. It's years since I've had Cheshire potatoes. They came with dirt on them and dad used to scrat them with a knife at the sink. It was mesmerising watching him slice runner beans too. I could never do it like he did. He grew them every summer. This was back in the early to mid 80s.
Things have changed so much in terms of how we shop and what we eat. Some better, some worse. But what brexit has taught me is that having a few weeks supply of food in, a supply of bulbs and fuses, a torch, and a first aid kit are the way forward. Convenience has been the death of preparedness and planning. I'm embracing the ways of old for they've kept us fed during times of bad weather, illness or lack of money.
Everyone should have a buffer of food, even if just enough to last a few days should there be horrendous weather, or illness, or whatever. Keep a loaf in the freezer. Have a carton or two of the decent uht milk (Moo is nice) and an extra packet of biscuits. I'll always be grateful to the prepper threads for changing how I shop and plan.