David Cameron is likely to have to defend his Cabinet reshuffle at Prime Minister's Questions today, with most commentators saying it makes the government more right-wing.

His new team - including Health Secretary Jeremy Hunt, Justice Secretary Chris Grayling and Transport Secretary Patrick McLoughlin - will then meet for the first time this afternoon.

The switch-around's also increased concerns about a possible U-turn on building a third runway at Heathrow.

London Mayor Boris Johnson's warned that Conservatives were all elected on a promise not to expand the airport: