[throwaway2245]

Several EU businesses have stopped selling to UK customers in the face of incomprehensible customs, duties, and delivery charges.

Those EU businesses that continue to sell to the UK will presumably already be working out an uplift to UK customer prices anyway - being denominated in a different currency makes this easy enough to do (it's impossible to identify consumer surcharges if you just list the prices in a different currency).

[rambojazz]

And as a customer I've already stopped buying from the UK because of unclear or high customs.

[throwaway2245]

As a British customer in the EU... same.

[rambojazz]

The end result is bad, both ways.