In angry exchanges in the Commons, the Shadow Health Secretary Andy Burnham warned the Coalition Government, it was making a "catastrophic political mistake" by pushing ahead with its NHS reforms.
But the Health Secretary Andrew Lansley said Labour's stance was "political opportunism dressed up as principle" and he accused Mr Burnham of putting forward an "erroneous view" in a constituency leaflet that suggested the Government was pushing through £20 billion of unmandated cuts.
The cuts, said Mr Lansley, were efficency savings given the go-ahead under Labour.
The shadow health secretary has an hour and a half to prevent the Health and Social Care bill going ahead today.
Figures from the Department of Health's annual survey of staff have been released and give a tantalising insight to life at the NHS.