The accident and emergency system has been left unsafe because of "political meddling" and family doctors will not help shore up the service, the British Medical Association GP chairman is expected to warn.
Dr Laurence Buckman will accuse Health Secretary Jeremy Hunt of spouting "rubbish" and being more interested in criticising doctors.
The GP leader is expected to say in a speech today: "He (Mr Hunt) does not want to bother with the facts when he can have a bash at those of us who on his own admission are overworked and strained beyond endurance.
"GPs are not prepared to shore up a system that has been rendered unsafe by unwise political meddling."
Dr Buckman's speech comes on the day Mr Hunt prepares to unveil his reforms to the GP service.