Plans to address the problem of struggling A&E departments "lack sufficient urgency", MPs have warned.
The Health Select Committee said it was not convinced recent proposals were an "adequate response" to the growing crisis.
Health Secretary Jeremy Hunt has previously admitted the "huge pressures" in A&Es reflect other problems in the health service and to address the problems, NHS England ordered local health authorities to form "urgent care boards" to ensure all A&E departments had "recovery and improvement plans."
But MPs have raised concerns about the boards, saying experts who gave evidence to them were "unclear" about how many of these boards were planned, what powers they will have and whether they are voluntary or compulsory, temporary or permanent, established structures or informal meeting groups.
More top news
Donald Trump has signed an executive order withdrawing from the Trans-Pacific Partnership trade deal.
Donald Trump made a number of "Day One" promises during the US election campaign. So what were they?
The white sheepdog puppies were pulled out by rescuer workers after surviving five days under tons of snow and rubble.