The UK did use evidence gained under torture

Referring to the Law Lords ruling and subsequent statements from the UK government:

The former British ambassador to Uzbekistan, Craig Murray, said it was untrue the UK Government did not use information from torture…

“As long as we kept within that guideline, then if the Uzbeks or the Syrians, or the Egyptians or anyone else tortured someone and gave us the information that was OK,” said Mr Murray.

From an article in Siber New Media

For a clear analysis of the case against the governments line go here