[Mindwipe]

> And if we're post Brexit, what tariff is the UK going to impose on a UK manufacturer that kills it's business?

The UK wouldn't impose the tariff, the EU would do based on reacting to a UK imposition on their businesses.

And I think everyone in Europe rightly believes the UK government couldn't find it's own actual self interest with both hands, so there's no reason to assume they will act rationally.