If the vote was to leave then the EU would have an interesting decision to make, i.e. wanting to discourage anyone else from doing the same vs our annual trade deficit with the EU of GBP 26 billion or so.
Personally I'm (slightly) more in favour of staying in, but come the referendum I shall probably vote to leave and accept with a sigh that this means doing what EngIP want. Positive reason would be that this could speed up independence for Scotland if, as seems likely, they were to vote massively in favour of staying in the EU; negative reason would be to piss off the Westminster establishment, although I do realise it would just absorb the EngIPpers and carry on screwing the rest of us.