ITV News has learned that half of the 500 British jihadists believed to have travelled to Syria and Iraq to fight with Islamic State militants have returned to Britain.
The Government has insisted it is taking tough action to prevent any more returning and creating a threat here, but its detractors claim not enough is being done.
ITV News Deputy Political Editor Chris Ship reports:
A British family have told ITV News of their devastation after discovering a close relative is fighting with the Islamic State in Iraq.
A French journalist who was held hostage with James Foley in Syria has told ITV News it was "devastating" to see his murder.