ID

Izzadeen, a London-born former Christian who converted to Islam on the eve of his 18th birthday, was with a second British man, according to Hungarian authorities.

He is believed to be Simon Keeler who has also served time in prison for funding terrorism.

Keeler, 44, was acquitted in July of planning to travel to Syria to join ISIS after being found in the back of a lorry at Dover.

However, he was jailed for 15 months after admitting possession of false identity documents.

Police said the pair were both were barred from leaving Britain without permission. The two men were taken into custody by Hungarian police because they did not have legal documents entitling them to stay in the EU member state.

It only emerged that they were subject to a European arrestwarrant after they were detained, police spokeswoman Viktoria Csiszer-Kovacs told AFP. The men are due to appear in court in Budapest to over their possible extradition.

A spokesman said it was unclear what the men had been travelling, although it was possible they were on their way to Syria via Bulgaria and Turkey.

There was no suggestion that the men were implicated in Friday's deadly attacks in Paris.

Izzadeen was born to a Christian Jamaican family in London and worked as an electrician. He gained notoriety in 2006 after heckling Britain's then-home secretary John Reid live on television.

He also refused to condemn the 7/7 bombings in London and described then-prime minister Tony Blair and US President George W. Bush as the 'real terrorists' for invading Iraq and Afghanistan.