Radical Muslim cleric Abu Qatada who was under strict bail conditions in Acton will be detained indefinitely after an alleged escape plot was discovered.
Qatada was living in a large house in the town after being released from prison in June but was arrested by immigration officers last month following claims he was planning to flee the country.
Conditions placed on the 47-year-old, once named as Osama Bin-Laden's right-hand man in Europe by a judge, meant he had to spend at least 22-hours a day indoors and was not allowed to use a mobile or meet certain individuals.
Home Secretary Jacqui Smith, using information from the security services, revoked his bail indefintely.
Ms Smith’s statement said: "The security service therefore assesses that the risk of Abu Qatada absconding have increased since his release in June 2008".