It would seem that Nissan don't seem to be too bothered at the moment.
http://www.bbc.co.uk/news/business-37787890
I wondered about this new found enthusiasm from Nissan for the United Kingdom of England and (maybe) Wales, then I saw Nissan have been given the equivalent of a BLANK CHEQUE (how generous of us):
"Britain has given Nissan (7201.T) a written commitment of extra support in the event that Brexit reduces the competitiveness of its Sunderland plant, in return for new production investments by the Japanese carmaker, a source with knowledge of the matter told Reuters.
In addition to unconditional investment aid, Britain pledged in a letter to offer further relief if the terms of Britain's European Union exit ended up harming the plant's performance, the source said."
http://uk.reuters.com/article/uk-britain-eu-nissan-support-idUKKCN12R1AKSo back to that £350m (not £350m) a week. Is it going to be sent to the NHS or sent to bribe the car manufacturers to stay?
Saying that, I suspect also part of the reason is that anything approaching "true" brexit (and I still haven't been told by any Brexiter exactly what that is) is going to take YEARS - long after that new Nissan model is through it's life-cycle.
Anybody interested in "why?" it's going to take years and years should take a look at the Jack of Kent blog (also on Twitter), written by lawyer and journalist (and for his sins a Villa fan) David Allen Green. He was actually a marginal Brexiter but exposes the real issues about Brexit (i.e. the ones not mentioned by the Sun and Daily Mail etc.). For the Brexiters who really don't go in for details (I get the impression that that's approximately 100% of you, give or take), you cannot simply wave a magic wand and then we'll be shot of the EU forever.
For example
The many hurdles of Brexit.You will note that 4 months down the line from June 23rd, we're just about to negotiate hurdle 1 of 19, with an almost guaranteed appeal to the Supreme Court to follow.
I humbly predict that this will be an extremely long-lived thread.