Dressed in ISIS Uniform, he pointed to the distance and declared: 'We will kill kuffar [non believers] over there.'

In the ten minute long propaganda video, five victims 'confessed' to spying for British security services.

One of the masked executioners, who spoke in a clear British accent, threatened David Cameron before killing the unarmed prisoners and calling him a “slave to White House” and “mule of the Jews.”

The English speaking terrorist and four other other terrorist shot the men from point blank range.

The video ended with a trailer for another execution in which a young, dark skinned boy warned Britain of coming atrocities.

It raised fears that the child, who appeared to be around five, may have been made to execute someone on camera, according to “Daily Mail” and the masked executioner in the video bore a chilling resemblance to ISIS's former executioner in chief, Jihadi John.

In Reaction a UK Foreign Office spokesman said: ‘We are aware of the video and are examining its content.’

Reportedly Jihadi John was killed by a US drone strike near an iconic clock tower in the terror group's de facto capital of Raqqa in Syria in November.

In another ISIS propaganda video released last month, a Russian speaking ISIS Terrorist threatened President Vladimir Putin before he beheaded a suspected spy on camera.

The executioner, who was later named as Anatoly Zemlyanka, 28, said to Russia: 'You will not find peace in your homes.