Cameron has not declared a policy at the moment Lisbon was signed as he said he would. He’s delayed his response by 24 hours. In that period he has seen a huge outpourring against him in the blogosphere, Bill Cash writing against him on Conservative Home, Hannan on TV disagreeing with him and now David Davis trying to set Party policy in the MSM, advocating a referendum within three months.
This 24 hour delay by Cameron has weakened his leadership inside the party considerably.
If his response at 4pm is weak, he will also lose much support in the country.
It would leave his leadership open to attack once he was elected PM. It would take a little more dithering Gordon Brown-style and we could see a Prime Minister thrown out mid-term by his own MPs.