The insurgent, calling himself Abu Rashash Britani, had already threatened to bring terror back to the UK.
Writing on Twitter, the fanatic said: “I think when we establish khilafah (a Muslim state), a battalion of mujahadeen shud head to UK and capture davidcameron & theresamay n behead them both.”
In a sickening call to arms he urged his “brothers” to take to the streets and kill.
He also called for revenge for the killing of a female Muslim student in Essex this week – although it is not known yet if her murder was religiously motivated.
Dozens of deeply-disturbing messages from Britani are a chilling echo of the tirade spouted by Michael Adebolajo and Michael Adebowale moments after they butchered helpless soldier Lee Rigby in Woolwich.
There are many potential threats to the security of the UK but this is the most serious to our homeland
In one, Britani says: “Pray a revenge attack takes place in the UK against enemies of Islam and Muslims.”
Last night the messages were removed from Twitter along, with his account. But anti-terror officers were monitoring his hate-filled outpouring.
A Home Office spokesman said: “We do not tolerate the existence of online terrorist and extremist propaganda.”
Britani claims to be in Iraq fighting for extremist Sunni Islamist militant group The Islamic State of Iraq and the Levant (Isis), which has swept into Shia-ruled Iraq from Syria.
David Cameron warned this week that the danger from returning British jihadists under the spell of Isis leader Abu Bakr al-Baghdadi is the greatest terror threat the UK currently faces.
Last night Baroness Neville-Jones, 74, former chairman of the Joint Intelligence Committee, repeated the warning saying: “There are many potential threats to the security of the UK but this is the most serious to our homeland.”
Al-Baghdadi has a £6million bounty on his head. Almost 500 Britons are thought to have joined is brutal terrorists.
Yesterday it emerged that a former Saddam Hussein henchman, dubbed the King of Clubs in the US “Deck of 55” most-wanted Iraqis, is a galvanising figure in the rise of Isis in northern Iraq.
Via – http://www.express.co.uk/news/uk/483671/UK-jihadist-tweets-Behead-Cameron