We have a Government contemplating and preparing for this
https://www.mirror.co.uk/news/politics/no-deal-brexit-food-firms-13987417. Because that is what Tory pensioners and hard-line nationalists want so that is how you keep the Tory party and the Government together.
"A quarter of food firms face "extinction" just six weeks after a No Deal
Brexit , an industry chief has warned.
...
Ian Wright, chief executive of the Food and Drink Federation, told BBC Radio 4's Today programme: "The simple fact is that this is the biggest threat that our members and businesses have faced since 1939. Many businesses are threatened with extinction.
...
"It's that serious and I don't think people are taking this threat seriously enough."
"This is really really scary and I don't think any amount of planning could get us ready for this"."
I reckon the game of chicken will soon involve the whole country and the EU. Everyone will be dared to not just carry on as before after 29 March and carry on trading as normal.