AV referendum: Cameron confronted by Huhne
Chris Huhne is said to have confronted the prime minister at a cabinet meeting over the No campaign's claims in the alternative vote referendum.
Sources described a "bit of a bust-up" as the energy secretary "went for" David Cameron and George Osborne.
But both the Yes and No campaigns have criticised Mr Huhne for diverting attention from the main issues.
Nick Robinson reports.