It will work both ways Pat.
Clearly a business that relies mostly on exporting to the EU will be hit harder than average and also businesses importing and distributing EU products such as Renault UK may also be hit.
But there are also opportunities, as Toyota Uk should find it easier to see in the UK and could take some business off Renault.
Meanwhile UK only businesses that currently lose contracts to German or Dutch companies will find they pick up more.
The degree of such a re-balance depends on the type of arrangement we leave under.