Neither am I sure of that. But the main topic of interest here about the referendum is whether there will be a difference in the outcome in the two countries, and what the effect of that might be.Irrelevant in my opinion, I'm not even sure the so-called Brexit will cause e.g. secession of Scotland (in a recent referendum the Scots have opted to remain in the UK), let alone Wales or Northern Ireland (where independentist parties are tiny).
Personally I think it very likely that the UK (and English) majority will vote to stay in the EU, which would also disrupt the continental federation plans of which you speak. Xenophobia is not as prevalent in England as xenophobes hope and centre-right Conservatives fear.