Nigel is right. BMW exports way more cars to the UK which runs a trade deficit. The UK can keep most of the trade deals in place, but separate politically and take control of their borders. I would not sacrifice border security for a trade deal. You would not have a country and it's a step toward national suicide anyway.
Remember, Nigel is not a Tory or in Labour. He is an independent.
I'm living in the UK and have not seen that story repeated anywhere else. The only story I did see was how the Chinese sarcastically pointed out that the UK is short of some 500 linguists and negotiators to even start trade deals with other countries.
Still what can you expect from the Daily Blackshirt :)