The Court of Appeal will rule today on a bid by Theresa May to overturn a decision allowing radical preacher Abu Qatada to stay in the UK.
The Home Secretary's legal team said he was a "truly dangerous" individual who escaped deportation through "errors of law".
The Special Immigration Appeals Commission decided in November that Qatada could not be removed to Jordan.
The Home Secretary pinned her hopes for ousting Abu Qatada from Britain on a fresh deal with the Jordanians.
A Tory MP and former government lawyer give their view on the UK potentially withdrawing from the ECHR to aid Abu Qatada's deportation.
The Government has been refused permission to take its fight to remove preacher Abu Qatada from the UK to the Supreme Court.