Fathers4Justice direct action threat for London

They hit the headlines in recent years with stunts like scaling Tower Bridge dressed as Spiderman and throwing powder at Tony Blair.

Now Fathers4Justice are threatening a new round of direct action, with London as the target.

The campaigners for fathers' rights say it's in response to the governments proposals on shared parenting.

Piers Hopkirk caught up with them at a rally in Trafalgar Square.