| Qatada has been convicted in Jordan in his absence
Islamic preacher Abu Qatada has won an appeal against deportation from the UK which could lead to him being freed.
Qatada - in prison pending deportation to Jordan - has been dubbed "Osama bin Laden's right-hand man in Europe".
The Home Office says it will challenge the ruling, and in the meantime he will remain in prison.
The Court of Appeal said it was concerned that evidence allegedly obtained under torture may form part of a future trial in Jordan.
The Jordanian national has been fighting extradition to his home country where he has been convicted for terror attacks.
| I believe that we will be able to secure his deportation to Jordan and we will push for it as soon as possible
Home Office minister
The appeal panel said the Special Immigration Appeals Commission (SIAC) had misdirected itself in law over the issue of any evidence obtained by torture.
Responding to the decision, Home Office minister Tony McNulty said he believed the deportation would still go ahead.
"I am pleased that the courts dismissed all but one of Abu Qatada's reasons for appeal," he said.
"We are seeking to overturn that point, and I believe that we will be able to secure his deportation to Jordan and we will push for it as soon as possible. In the meantime, he remains behind bars."
Jordan is one of a number of countries with which the UK has signed a memorandum of understanding which ministers say will ensure that any deported terrorism suspects will not face torture or ill-treatment on return.
|MEMORANDA OF UNDERSTANDING The UK signed memoranda with Jordan, Libya and Lebanon in 2005 Their purpose is to facilitate deportation of terror suspects between countries The Foreign Office says they act as assurances from those countries that suspects sent back will not be tortured Critics say the agreements are neither binding nor offer suspects any protection
Shadow Home Secretary David Davis criticised the government's approach, saying it should concentrate on prevention and prosecution instead of trying to deport individuals once in the UK.
He said: "They should answer our calls to establish a dedicated UK border police to secure our borders and prevent foreign terror suspects from entering the country in the first place."
Liberal Democrat home affairs spokesman Chris Huhne said the court was rightly concerned about the use of evidence gained under torture in Jordan, which would not be admissible in a British court.
He said Qatada should now be charged in the UK courts, or released.
Gareth Peirce, Qatada's solicitor, said she welcomed the court's decision but criticised the memorandum of understanding, saying it was "unenforceable" and carried "no possible sanction or redress if breached".
Human rights group Amnesty International called for Qatada to be "fairly tried - not shipped off to Jordan to be sentenced on the basis of evidence that was tortured out of someone".
In a separate ruling on Wednesday, the three appeal judges also found in favour of two Libyan suspects, after the government appealed another decision by Siac.
Siac had ruled that the pair faced a risk of ill-treatment, including torture, if they were returned to Libya.
| Qatada made a video appeal to the kidnappers of Norman Kember
As a result of the appeal court ruling, deportation proceedings against 10 other Libyan nationals have effectively been abandoned.
A Home Office spokesman said the government would not appeal against the judgment in this case.
Abu Qatada became one of the UK's most wanted men in December 2001 when he went on the run on the eve of government moves to introduce new anti-terror laws allowing suspects to be detained without charge or trial.
In October 2002 the authorities tracked him down to a council house in south London and took him to Belmarsh Prison.
He was eventually freed on bail in March 2005, but was made subject of a control order to limit his movements.
In August that year he was taken back into custody pending extradition to Jordan. http://news.bbc.co.uk/1/hi/uk/7338553.stm
Appeal court leaves Government's terrorist deportation plan in tatters
color-666">Abu Qatada, the radical cleric whose deportation to Jordan was blocked by the Appeal Court today
Richard Ford, Home Correspondent
The Appeal Court today dealt a huge blow to the Government's efforts to deport terror suspects when it blocked a bid to send Abu Qatada, known as al-Qaeda's spiritual ambassador in Europe, to Jordan.
Three judges also allowed appeals by two Libyan terror suspects against deportation on the grounds that they face a risk of ill-treatment and torture. After the ruling, the Government abandoned deportation proceedings against ten further Libyan nationals, effectively recognising that there is no chance of deporting suspects back to Tripoli.
Abu Qatada was described by the Special Immigration Appeals Commission (SIAC) as an Islamic extremist actively engaged in trying to change the regime in Jordan and with links to terrorist groups.
Although absent from Jordan, in 1999 a court in the country sentenced him to life imprisonment for conspiracy to commit terrorist activities.
SIAC dismissed his appeal against deportation last year on the grounds that his human rights would not be breached if he was forced to return, as Jordan had signed a memorandum of understanding - a document in which North African and Middle Eastern countries say suspects will not be subject to torture or inhumane treatment.
But today, because of concerns surrounding the use of evidence obtained by torture, the Appeal Court judges overturned SIAC's decision.
In the second ruling, the three judges, headed by Sir Anthony Clarke, the Master of the Rolls, admitted that it was agreed that two Libyans, identified only as AS and DD, were a threat to national security with links to al-Qaeda.
But Sir Anthony added that the UK would have serious concerns about the real risks faced by the men as extreme Islamist opponents of the Libyan regime and their alleged membership of the Libyan Islamist Fighting Group.
Abu Qatada is to remain in a top security jail being while the Government appeals against the ruling, but a Home Office spokesman said the Government would not appeal against the judgment in the Libyans' case.
"We have already taken steps to protect the public," he said. It is believed that AS and DD, who were previously on bail from SIAC, have now been handed control orders.
Other steps - including further control orders - have been imposed on the other 10 Libyans, it is understood. http://www.timesonline.co.uk/tol/news/uk/crime/article3713413.ece