British jihadis involved in the brutal beheading of American reporter James Foley callously boasted of making personal fortunes from ransoms paid for other released hostages.

The gang openly talked of making so much money they could ‘retire to Kuwait or Qatar’, according to testimonies by former hostages obtained by The Mail on Sunday.

The revelation comes as CCTV footage emerged reportedly showing the moment five separate British jihadis strolled through the departure lounge of Gatwick Airport on their way to fight in Syria.

One of the extremists said to be pictured at Gatwick is now in jail, while at least one more has been killed while fighting.

All the men were among more than 500 Britons who have enlisted with jihadist groups in Syria and Iraq, prompting warnings of new terror laws from the Home Secretary.