What impact will today's ruling on the Bedroom Tax have?

The High Court finds in favour of two families who were complaining that the spare room subsidy was unfair to them and that they had good reason to have a room which remained empty for quite a lot of time.

One claimant was a woman who'd been the victim of domestic violence who had a panic room installed in her house. The other claim was from two grandparents who were caring for a severely disabled teenage boy.

Paul Lewis from Radio 4's 'Money Box' programme explained the impact of the ruling on PM.