More whistling in the wind?

The Foreign Sec., P. Hammond, knows that any agreement which the PM reaches with other EU leaders will be totally worthless. The most recent evidence for this is the way the other leaders casually discarded their 2010 agreement on the EU rescue fund to bail out Greece, even though the agreement rules out such an abuse.
    The big question is whether D. Cameron will sell the country short with another written (and worthless) agreement on EU reform, or whether he will have the guts and stickability to insist on getting the reforms written into a new treaty. Which will then have to be ratified. Which makes Dave’s promise of a referendum by 2017 look undeliverable, given the time it takes to cobble together a new EU treaty.