as 500 British subjects have gone to Syria and Iraq for this cause of jihad,” he added.

The Home Office would not comment on whether the man in the video has been identified and it is understood that, for security reasons, the knowledge would not be made public if it did exist.

A former rapper fighting with Isis in Syria is believed to be one of several British jihadists under investigation.

Abdel-Majed Abdel Bary pictured here in a YouTube video showcasing his rapping

Abdel-Majed Abdel Bary, 24, was known as L Jinny or Lyricist Jinn at home in London, where his rising music career saw him appear in videos and have his singles played on BBC Radio in 2012.

He came to national attention earlier this year, when he posted a picture ofhimself holding a severed head on Twitter after resurfacing in Syria.

Bary reportedly travelled to the country last year from Maida Vale, west London, where he lived with his mother and five siblings.

His father Adel Abdul Bary, an Egyptian refugee thought to be one of Osama Bin Laden’s closest lieutenants, was extradited from Britain to the United States on charges of terrorism in 2012 for his alleged roles in the bombings of two US embassies in east Africa in 1998.

Bary’s current whereabouts in Syria is not known and his Twitter account under the name “Terrorist” @ItsLJinny has been deactivated.

Previous posts mentioned Abu Hussein al Britani, a fellow Isis militant who has uploaded pictures of himself on Twitter with guns in Syria.

He and associate Abu Abdullah al-Britani were seen offering