The European Court of Human Rights has backed terror extraditions from the UK to the United States, including those of Mr Ahmad, from Tooting, and controversial cleric Abu Hamza.
The Strasbourg court held there would be no violation of human rights for those facing life and solitary confinement in a top-security US prison.
The court sanctioned the extradition of Abu Hamza, Babar Ahmad and three others.
Babar Ahmad, a British Muslim, was originally arrested at his Tooting home in December 2003 under anti-terror legislation before being released six days later without charge.
The US Goverment claimed Mr Ahmad was involved with terror websites – a charge he vehemently denies.
He was re-arrested in August 2004 and imprisoned prior to the US Government’s extradition request under the controversial Extradition Act 2003 – he has been detained without trial ever since.
The court’s ruling could still be appealed to its final Grand Chamber.
He and his family have fought extradition on the basis that the crimes he is alleged to have committed – supporting terrorism through a website – occurred while he was on British soil.
However, the European Court said there would be no breach of human rights if the men were to be held at ADX Florence, a Federal Supermax jail used for people convicted of terrorism offences.