David Cameron is being questioned by the chairmen of the various Commons select committees for the first time since he became prime minister.
The session started at 1400 GMT with questions about the spending review and Ireland’s debt crisis.
Mr Cameron defended his decision to ring fence the NHS budget, saying it was the “thing I care about most”.
Prime ministers are quizzed by the committee of chairmen, called the liaison committee, twice a year.
This article is from the BBC News website. © British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.