A lot of popular opinion in the UK though, from what I can tell, is actually in favour of Daves actions though, there has been nothing but negativity about the EU for the past twenty years and most Britains seem to be pretty fed up of it. For most problems we are told "We cannot do this because of EU regulations", particularly in the farming and fishing industry. As a result there is not inconsiderable resentment towards the EU in Britain, something which I think that Dave has unwittingly tapped into. It's obvious his stance has nothing to do with the average Joe Public and everything to do with the fat cats in the City, but he can, and will, spin it that he did it for the people not the banks.
The amount of resentment from the EU towards the UK is only going to feed the anti-EU sentiment in the UK and will, in time, most likely result in the UK withdrawing from the EU or at the least withdrawing from a lot of its commitments to the EU.
If conducted correctly, a withdrawal from the EU is feasible within the next ten to fifteen years, however that requires a level of consistency and forward thinking which is unseen in modern politics and thus any British withdrawal from the EU is likely to be a frenzied, damaging affair conducted under a cloud of emotion and angry diplomatic exchanges...it's for this reason I am against it because it would be, as I have already said, like taking a tree out of the ground without bringing the roots, replanting it and expecting it to grow, our roots, our trade is firmly linked within the EU market, there is no question of it, and a sudden withdrawal and the adjustment of tariffs that would follow it (particularly if Berlin and Paris, in a fit of anger, decide to raise tariffs against the UK) would devastate our economy in a period when it really cannot afford to have such damage. We're not the US, we do not have the luxury of being able to keep putting the problem to one side, nor are we Russia, with massive oil reserves to sell...if we get into an economic problem outside of the EU, then we'll have no-one to rescue us.
Then again, by the time we'd get into a problem in the EU then there'd be no-one left to rescue us anyway!