It is understood that hundreds of British Special Forces and intelligence-gathering personnel are currently working in the region in an effort to capture Jihadi John.
The operation also involves liaison with Kurdish and Iraqi soldiers. They are using an array of sophisticated equipment to track him down and free other hostages.
Jihadi John is believed to have travelled to the war-torn country from London over a year ago after becoming radicalised and raising money for the jihadists whilst in Britain.
US authorities believed they had worked out the fighter’s position shortly before the first video – showing US journalist James Foley’s execution – was released on September 2.