Only 30% of the uks food comes from the EU
That 30% also includes food imported to the EU under trade deals. The average WTO tariff on imported food would be around 20%, and there is no evidence that the countries that supply the remaining 20% of the UK’s food would be able to increase supplies.
As for flights I'm fairly sure you dont need to be in the EU to fly there ask Africa, Asia or America.
Ask the USA about the Open Skies agreement that covers flights between the EU and the USA.
you could be looking at a ruling party supported by less than 20% of the population.
The Tory vote at the 2017 election equates to around 20.4% of the UK population.
Everything else there are international established rules including flights
See Open Skies above.
It will be interesting how Spain and Greece manage without 6 months of British tourists or Germany without 6 months of exports to the UK.
UK tourists have a low per capita spend. Countries like Spain will target tourists with cash to spend, such as Northern Europeans, Scandinavians and the Chinese.
As for imports to Germany, German supply chains are factoring that in already by sourcing parts from EU27 countries and abandoning UK suppliers.