So by that logic you'd like to see smaller organisation governing smaller regions within Britain itself? Or is one government governing 66 million people in 4 different countries ok by you? Would the break up of the United Kingdom into 4 (probably 3) separate countries not be a price worth paying for England to be able to govern itself with your idea of sovereignty?
It's interesting to me that back when Britain was "Great", they didn't appear to share your inclination towards sovereignty and smaller government. Instead they seemed very determined to set sail and impose their law and government on as many countries as they could get their hands on.
As such, they created complicated situations such that of Northern Ireland. Now, because 52% of Britain have decided they no longer wish to be a part of the union they willingly and knowingly signed up to of their own free will, an Island that had such complication forced upon it by the historic actions of your nation should be faced with either violent or economic uncertainty? Is that a just and fair sacrifice to expect a neighbour to bear, just because you have changed your mind?
It's this idea that Europe have wronged Britain by somehow hoodwinking them into willingly joining the EU while at the same time, Britain should be completely abdicated of all responsibility for their former actions that I struggle with the most. It's hard to believe anyone can be so self-righteously selfish with a straight face.