Charles Clarke, the Home Secretary, appears to have already filled in the first name on his global database of hate: Omar Bakri Mohammed.

The Syrian-born father of seven has lived in Britain on state handouts since being deported from Saudi Arabia as an extremist 20 years ago - and has been accused of abusing his refugee status to preach a message of undiluted bile against the West and its values.

Two of his followers have been involved in suicide bomb attacks in Israel and Mr Bakri Mohammed has declared that Islamists were no longer bound by a "covenant of security" which forbade them from carrying out attacks in Britain.

Bakri Mohammed, 47, was born into a wealthy family in Aleppo in Syria, and rose to prominence in the 1980s when the city sheltered many radicals. He joined the Syrian branch of the Muslim Brotherhood as a young man and participated in their revolt against the Syrian Baath Party and the government of Hafez al-Assad.

When that rebellion was crushed in 1982, he moved to Beirut where he joined Hizb ut-Tahrir. In 1983 moved to Jeddah.

He was deported, and claimed political asylum in Britain in 1985 and was given indefinite leave to remain. He split from Hizb ut-Tahrir ten years ago and founded al-Muhajiroun, an hardline Islamist group. Mr Bakri Mohammed dissolved the group last year and is now believed to run an organisation called the Saviour Sect.

Earlier this year, Mr Bakri Mohammed told followers in a webcast monitored by The Times that Britain was "Dar ul-Harb" - "a land of war". And he said that the jihad was a correct path for all Muslims, not just those living in Muslim countries. "The jihad is halal for the Muslims wherever they are, the whole ummah (Muslim community) wherever they are. OK brothers - wherever you are, do it."

He also caused outrage by suggesting after the terror attack on the school in Beslan, Russia, that an attack on a British school could be justified as long as women and children were not deliberately killed.

Infamously, he also referred to the September 11 hijackers as the "magnificent 19" before organising celebrations on the anniversary of the attacks on Washington and Manhattan.

But the final straw may prove to be his comments to the London Evening Standard, published yesterday, in which he denounced the London bombings but said: "I blame the British Government and I blame the British people. They are the ones who should be blamed. The British Government has said, ‘You are with us or with terrorism’. I don’t think that is the way forward."

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