One aspect of the Government's complicity in torture is it's defence of using information gained by torture in legal cases. This contravenes the United Nations Convention Against Torture, which explicitly forbids the use of such 'evidence' in legal proceedings.
 
In December 2005 the Law Lords confirmed that the use of evidence derived from torture was unlawful.
 
The case was brought by the men previously detained without charge under the Anti-terrorism Crime and Security Act. They were appealing an earlier decision that ‘evidence’ obtained by torture of another person is allowed unless UK agents have either directly procured it, or taken part in its procurement.
 
With 13 other organisations, Liberty intervened in the appeal, saying that the ban on torture and other forms of ill-treatment is absolute and cannot be opted out of. The use of ‘evidence’ that might have been obtained by violation of that ban is therefore unlawful.
 
We told the court how concerned we were by the increasing use of counter-terrorism measures that bypass human rights obligations, and the implications of this appeal on efforts to eradicate torture world-wide.