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Lawyers for Rangzieb Ahmed, who had fingernails torn out during questioning, say British complicity was so great his conviction should be quashed.
At a full hearing, Ahmed's lawyers are expected to argue that the UK's complicity in his torture was so abhorrent that he should never have been put on trial.
The appeal court heard that since his conviction, parliament's joint committee on human rights, and the UN special rapporteur on torture, had
both concluded that handing lists of questions to intelligence agencies known to use torture – in the manner that MI5 and Manchester police have admitted – amounted to complicity.
The human rights select committee and the UN watchdog have also condemned the practice of asking those agencies known routinely to use torture to detain suspects, in a manner that Davis alleges happened in the Ahmed case."