I think the UK should do what the UK wants to do.
The european union is a good idea, But the guys in brussels should not dictate what every EU country should do.
I agree that having multiple country,s using one currency makes international trading easier, and that EU wide laws for
power generation, polution etc is a good thing, but it should be more of a democracy then it is now.
I dont know how the UK government handles these things, but the Dutch government basicly just accepts everything that brussels decides.
An good example is a referendum they held a few years ago after a decision from brussels.
I cant remember exectly what the actual topic was, but it got rejected with more then half the country against the change, so they scrapped that topic off their list.
Then a year later, they implemented it without a referendum
.