The change of tactics aka a vote of no confidence in Dave, is well described by Reuter's jorno Michael Holden. I give the link below.
The most telling quote from this piece comes from Charles Grant, director of the Centre for European Reform think tank who said
"Hague was well respected in the party and noted his comments, coming days after Major, could be designed to move the debate beyond Cameron's tricky drive for EU reform."
"There will be a transition from saying 'I want to reform the EU so it will work better' to saying 'the EU is a good thing in itself'," he told Reuters. "It's no coincidence that Major and Hague have come out in this way."
"Despite the EU's many failings, he said, it provided stability for fragile democracies in central Europe. It would also not be in Britain's interests for the bloc to fall apart with such volatility in the Middle East and the world's economies"
This is not within the UK's power. It is only the ruling EU elite, Juncker, Merkel, Hollande that can reform the EU to try and achieve these laudable aims but they cannot see past their own political self interesr, VW cars, CAP and a political power grab.
It is fatuous for our Europhiles to argue we can change these politicians views which are governened by the simply fact that their re-election is paramount as it is with all politicians. Good things come last!