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Two British jihadis could hold the key to unmasking executioner John.

Aine Davis, 30, left Hammersmith, London, last year to fight for Islamic State in war-torn Syria.

A student was recently acquitted of trying to smuggle £16,000 to him in her knickers.

Davis’s wife, Amal El-Wahabi, 27, of Harlesden, London, was convicted of funding terrorism.

A former drug dealer known as Biggz, Davis converted to Islam after being radicalised in jail.

Police are investigating his links to extremists in London.

He has not yet been ruled out of a probe to unmask the executioner, one of a group of three British jihadis nicknamed the Beatles.

A second possible link is London rapper Abdel-Majed Abdel Bary, 23, who left his family’s £1million home in Maida Vale to join jihadis in Syria.

He has posted images of himself posing with weapons there.

His father Adel Abdul Bary is a suspected al-Qaeda mastermind extradited to the USA in 2012.