Grinning as he poses with a fearsome anti-aircraft gun, this is a young British Muslim who has swapped alcohol and nightclubs for violent jihad.

The former Aberdeen schoolboy was identified yesterday as the third Briton in a chilling recruitment video for the hardline Al Qaeda-linked terror group ISIS.

He was named as Abdul Raqib Amin by former acquaintances, who spoke of their shock at seeing the keen footballer and 'hyper, energetic lad' boast of waging holy war in Syria.

The jihadist was filmed alongside fellow British extremists Reyaad Khan and Nasser Muthana, both 20, urging other Muslims to fight for ISIS in the Middle East.