Fictional characters created online by Sky News were sent terror guidebooks by senior jihadists in Syria, including advice on raising funds and making weapons.
By posing on Twitter and in chatrooms as two individuals committed to jihad -- one male, one female -- the British television network gained a disturbing new insight into the extremists' tactics.
From the undercover operation it emerged that the Islamic State of Iraq and Syria (ISIS) already has a number of potential bombers in the UK with some of whom trained in Syria and are ready to attack.
One jihadist was quoted as saying that this Saturday's VJ (Victory over Japan) commemorations involving Queen Elizabeth II and the royal family were a target.
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The insight comes just days after it was reported in the British media that British jihadis were plotting to blow up Queen Elizabeth II at VJ Day commemorations in central London.
The online posts by the fictional characters over the past four months attracted the attention of two major players in Islamic State's so-called cyber caliphate.
He has been identified by the US Secret Service as a top-five target for elimination by drone strike.
His wife, Sally Jones, from Kent, is also in Syria working alongside Hussain in Raqqa but dealing with female ISIS-supporting jihadists.
From the start it became clear that ISIS wants its recruits to attack the UK and not travel to their so-called caliphate.
The fictional characters were advised to form gangs and to create a British Islamic State over a long period.
Jones quickly asked the character what she wanted to do in the UK -- to cut a head off or blow up a bomb.
Jones revealed she had another potential bomber in Scotland and two others who had so far failed to attack, the report said.
With one or even three potential real bombers at large, the Metropolitan Police's anti-terror branch has been informed, it said.