For more than a hundred years they have been tasked with caring for the children of the rich and famous; their cooking, child rearing and housekeeping skills prized the world over.

But the famous Norland nannies have now been forced to add an all-too modern skill to their armoury - dealing with terrorists.

Students nannies at Norland College are being instructed by the former head of UK counter terrorism on how to protect their young charges from the threat of kidnappers and terror gangs.

The move follows the growing demand for Norland nannies among the world's oligarchs and super rich, whose children are seen potential targets for ransom demands.