Home Secretary Theresa May has told MPs that a new treaty signed by the British and Jordanian governments will "finally make possible" the deportation of the radical cleric Abu Qatada.
Qatada, who lives in London, faces terror charges in Jordan.
His legal team claims evidence obtained by torture could be presented in a re-trial.
But Mrs May also warned that even with the treaty, Qatada can still appeal against any new rulings on his extradition.
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The rally comes after it emerged that the Home Office destroyed thousands of landing cards documenting the arrival of windrush-era migrants