Islamic militants have warned that Alan Henning (inset right), 47, would be the next person to die after father-of-two David Haines (centre and right). Mr Henning is believed to have been working for a Muslim charity and had originally thought that he would be released by ISIS because he was only in Syria to carry out aid work. The development came as Prime Minister David Cameron (left) said today that people will be ‘sickened’ that the man who killed Mr Haines could be from Britain.
David Cameron’s response below:
