What is really going on in politics? Get our daily email briefing straight to your inbox Sign up Thank you for subscribing We have more newsletters Show me See our privacy notice Invalid Email

Horrifying footage of an ISIS killer with an English accent threatening to attack the UK before gunning down four 'British spies' has been released by the terror group.

The video, released by Islamic State's propaganda organisation, shows the masked man wielding a pistol as the four victims kneel in orange jumpsuits in the dust - a sickening scene beloved of the jihadi murderers.

The video also features a young boy with an ISIS headband threaten the UK - and he also appears to have an English accent.

The killer says: "This is a message to David Cameron.

"Oh slave of the White House, oh mule of the Jews, how strange it is that we find ourselves today hearing an insignificant leader like you challenge the might of the Islamic State.

"How strange it is that a leader of a small island threatens us with a handful of planes? One would've thought you'd have learned the lessons of your pathetic master in Washington and his failed campaign against the Islamic State.

"But it seems like you, just like your predecessors Blair and Brown are just as arrogant and foolish.

"In fact David, you are more of an imbecile, only an imbecile would dare to wage war against a land where the law of Allah reigns supreme under the justice and security of the Sharia.

"Oh British government, oh people of Britain, know that today your citizenship is under our feet and that the Islamic State, our country is here to stay and we will continue to wage jihad, break borders and one day invade your land where we will rule by the Sharia."

"As for those of you who wish to continue fighting under the banner of Cameron on the minimum wage, we say to you to ask yourself, do you really think your government will care about you when you come into our hands?

Read more:

"Or will they abandon you as they have abandoned these spies as those who came before them?

"Because you will lose this war as you lost in Iraq and Afghanistan. But this time when you lose, your children will inherit your defeats and remember you as the fools who thought they could fight the Islamic State."

Labour MP Sadiq Khan said: "The evil and disgusting ISIS propaganda video shows why we need to do much more to tackle radicalisation in Britain."

A Foreign Office spokesman said: "We are aware of the video and are studying its contents."

Then the man and four other masked gunmen shoot the 'spies' in footage too graphic to be shown.

Video Loading Video Unavailable Click to play Tap to play The video will start in 8 Cancel Play now

The video ends with the young boy, who appears to be around five, saying: "We will kill the Kuffar (unbelievers) over there."

The 'spies' are forced to confess to their alleged crimes on camera.

The first victim, who is just 17, said: "My name is Abi Mohamad Abd Al-Ghani, I was born in Raqqa in 1998.

"I firstly went to Turkey where I met Abdelrazzak (another of the victims) and we agreed to work together. He gave me a small camera and I started sending reports from inside Raqqa city.

"After that, I found out that the videos I had recorded were shown on Orient TV and BBC News."

The second spy introduces himself as Hael Marwan Abdulrazzaq, he's 40 years-old and repairs air conditioners. He said: "I once received a small camera, I would give it to my father in Syria, he would film and then I would take it from him and hand it to a Volkswagen driver who would send it to Turkey.

The third spy introduces himself as Faisal Sheikh Ahmed Hamoud, 25 who lives in Raqqa. He was paid $2,000 for information and asked to set up an internet cafe and provide information on ISIS.

The fourth spy is called Omar Hamoud Al-Jafaar, and he was paid $700 to set up an internet cafe.

A Foreign Office spokesman said: "We are aware of the video and are studying its contents."

Jihadi John, real name Mohammed Emwazi, is believed to have been killed in a US drone strike near a clock tower in Raqqa, Islamic State’s de facto capital in Syria in November.

(Image: Reuters)

Emwazi participated in gruesome videos showing the killings of American and British hostages.

Emwazi, who was born in Kuwait but raised in the Uk, came to notoriety in a video in August 2014 which showed the beheading of US journalist James Foley.

He also appeared in videos showing the killings of Alan Henning and David Haines, American journalist Steven Sotloff, aid worker Abdul-Rahman Kassig and Japanese journalists Kenji Goto and Haruna Yukawa shortly before they were killed.

(Image: Getty)

The films included blood-curdling threats against Western nationals from Emwazi, whose English accent earned him the nickname Jihadi John.

In February this year, he was unmasked as Kuwaiti-born IT worker Mohammed Emwazi, who moved to the UK aged six and was educated in London. It emerged that Emwazi had been known to British intelligence services but managed to travel to Syria in 2013.

Mr Haines, an aid worker from Scotland, was executed in September 2014 having been held captive for 18 months. A video released a month later showed 47-year-old Salford taxi driver Mr Henning appearing to be beheaded.

The sickening message in full

This is a message to David Cameron. Oh slave of the White House, oh mule of the Jews.

How strange it is that we find ourselves today hearing an insignificant leader like you challenge the might of the Islamic State.

How strange it is that the leader of a small island threatens us with a handful of planes. One would have thought you would have learned the lessons of your pathetic master in Washington and his failed campaign against Islamic State.

It seems that you, just like your predecessors Blair and Brown, are just as arrogant and foolish. In fact David, you are more of an imbecile.

Only an imbecile would dare to wage war against a land where the law of Allah reigns supreme. And where the people live under the justice and security of the Sharia.

Only an imbecile would dare to anger a people who love death the way that you love your life. Oh British Government. Oh people of Britain. Know that today your citizenship are under our feet.

And that the Islamic State, our country, is here to stay. And we will continue to wage jihad, break borders and one day invade your land where we will rule by the sharia.

But as for those of you who wish to continue fighting under the banner of Cameron on the minimum wage, we say to you, to ask yourself, do you really think your government will care about you when you come into our hands?

Or will they abandon you, as they have abandoned these spies, and those who came before them? Because you will lose this war, as you lost in Iraq and Afghanistan.

But this time when you lose, your children will pay for your deeds. And remember you as the fools who thought they could fight the Islamic State.