So, hypothetically speaking, irrespective of the party colour - trust no one?
And dont neccessarily jump on a passing bandwaggon and blame the current incumbents for the errors of the assorted predecessors.... 
I would have to disagree with you on that H.
The present incumbents and their breakless predecessors willingly opened their administrative legs for whatever Brussels decided to put their way.
The resultant disease from that rape of democracy will pervade this country from this point onwards.
T Blair and G Brown have shown little regard for the sovereignty of this nation and have denied the electorate the right to have a say in such a fundamental shift of power.
They have been in office for nearly 12 years and at no time, as it now seems, were we ever to get the chance to have a say on this matter.
That being the case, I would submit that both this administration and the previous can be fairly and squarely put on the spot and condemned for cowardice and sharp practice the result of which has seen the sovereignty of this land discarded.