British referendum / Independence

[Ayahuasca]

Given that Germany has said it will agree to Eurobonds in return for fiscal union, it seems that the solution to the Euro crisis could be a European superstate. The UK would then have to renegotiate its relationship with Europe as it's OK to be a half-hearted member of a loose coalition of countries but you are either completely in or completely out of a superstate. So, if the UK stands aside from Europe completely what would the ramifications be?