Strike action may face new restrictions

Prime Minister David Cameron has signalled that he is prepared to toughen the laws on strike action.

The message was reinforced by the Mayor of London, Boris Johnson, who suggested that industrial action should be outlawed if less than half the union membership has taken part in the strike ballot.

Union leaders say it is a cynical attempt to divert attention from the government's failure to clamp down on bankers' bonuses.

The BBC's Nick Robinson reports.