Cameron vows to hunt 'barbaric, repulsive terrorists' who beheaded aid worker Alan Henning

The British Prime Minister David Cameron has vowed to hunt down the "barbaric and repulsive terrorists" responsible for beheading British aid worker Alan Henning.

Islamic State militants posted a video of his murder on the internet last night. Mr Hennis was a 47-year-old former taxi driver from Salford in England who was kidnapped last December in Syria by IS militants.