It's telling that in the lead up to the Referendum in the UK, a large part of the 'Remain' arguments have revolved almost solely around economics - because that's the domain in which the EU does make a lot of sense.
The question really is will people be prepared to accept the risk of short term economic pain to reassert sovereignty. I fear patriotism is far enough gone now that too many people won't be.
There'll always be an England,
And England shall be free
If England means as much to you
As England means to me
Those last two lines - there are too many people now to whom England doesn't mean much to them. Nor does Britain as a whole - but Welsh nationalism, and Scottish nationalism, and Irish nationalism are seen as much more defensible than English nationalism - and it's England that needs to stand up today.
Britons never, never, never shall be slaves!
But how many people still see themselves as Britons?
In the special English edition of Deanna Durbin's "Nice Girl," a 1941 movie, she sings the song in a very moving rendition. I would hope that English patriots managed to play it over the airwaves during the campaign--that is if the powers that control the British airways would allow an expression of that sort.