As I already said, businesses hate change. Will BMW, Mercedes, Audi allow their government to make their cars uncompetitively expensive? What about Airbus?
They simply won't allow their governments to start damaging their business models over petty squabbling. Equally, they won't want to pay more for UK products than they already do - the idea is madness.
It's all just threats and bluster. When it comes down to it, tarrifs where they don't already exist don't make sense for anyone.
@milo , I know any deal would need assent from the majority, but when have Germany ever not got their way in the EU? If they want it, it will happen. Especially as the countries most likely to object need a strong, trading EU in order to keep being bailed out financially.
If the uk votes leave, would it not be in the interests of the 'European project' to make sure we go through a tough time? Not sure if German car makers or french famers/energy companies views would way up favourably against other countries seeing the uk negotiating a great deal and prospering thus encouraging others to want to do the same.
We may be a net importer but the Eu, even without us would be the largest trading block in the world, and therefore would be able to absorb any tariffs we impose on them much more successfully then we would visa versa.