Re: Impact will vary
I suspect it won't sort itself out anywhere near that quickly.
The brexitters assure us that 'no deal' and WTO rules will be absolutely fine. Apparently the difference between the absolute best possible free trade deal (single market, no border checks, no quotas, uniform standards) and WTO rules for 50% of our trade is really not something we'll even notice.
But at the same time, we absolute MUST leave the EU customs union, so we can sign third party trade deals for 20-30% of our trade, which won't be anywhere near as deep as the single market, with the US, China, etc., and this will create a massive boom in the economy.
You don't need to be a nobel economist to see that these two arguments are completely contradictory. Either WTO rules are fine and trade deals make little difference, or they aren't fine, and the difference between a free trade deal and WTO is huge. But brexitters are basically arguing both cases at the same time.