A radical Muslim cleric once described as "Osama bin Laden's right-hand man in Europe" will soon be released, but on strict conditions including a ban on attending mosques, officials said Tuesday.

The Home Office announced last month that Abu Qatada, who first arrived in Britain in the early 1990s but disappeared before new anti-terror laws came in after September 11, 2001, would be freed on bail.

On Tuesday the Special Immigration Advisory Commission (SIAC) published the detailed bail and curfew conditions, including wearing an electronic tag and being subject to a 22-hour-a-day curfew at an undisclosed location.

"He will be released today or tomorrow," said a SIAC press officer, releasing the eight-page bail conditions.

The document notably bans Qatada from attending "any mosques", as well as from leading prayers, giving lectures, or "providing religious instruction" to anyone except his wife and children.

Qatada, who has been convicted of terrorist offences in Jordan, is also banned from associating with a list of named people, including Osama bin Laden, as well as the Al-Qaeda leader's deputy Ayman al-Zawahiri.

Qatada -- who was labelled bin Laden's "right hand man" by a leading Spanish anti-terror judge -- is also banned from publishing any document or making any statement without the Home Secretary's approval.

Born Omar Mahmud Mohammed Otman in Bethlehem, Qatada arrived in Britain in 1993 on a forged United Arab Emirates passport and claimed asylum, gaining refugee status in 1994.

He disappeared before new anti-terror laws came in after the September 11 attacks in 2001, but was arrested in October 2002 and spent three years in the high-security Belmarsh prison in south-east London.

At the end of the prison term he was released, although made subject to a control order, but returned to jail in August 2005 as part of a crackdown against Islamist extremism after London bombings.

Qatada appealed against his planned deportation to Jordan -- where he has been sentenced in his absence to life imprisonment for terrorist offences -- at the SIAC court in May last year.

The Home Office is appealing against a decision to block the cleric's deportation, based on the risk of mistreatment to him in Jordan.