UK names second hostage held by Islamic State

British officials have named a second UK hostage being held by the Islamic State group.
Alan Henning is being threatened with death in the latest Islamic State video, which announced the beheading of another British hostage, David Haines.
In the video, Henning is shown briefly on camera and also threatened with death.
British officials and Henning's family had asked the media not to publish his name out of concern for his safety, but that request was dropped this afternoon.
The family has also released a photo of the hostage.