I've written about US torture of prisoners before, last time about a Canadian citizen whom the Canadian High Court has declared to have been tortured by the US with the complicity of the Canadian secret services.
Today, it seems to be the turn of the British High Court. David Davis raised a point of order in the House of Commons today (in order to get round reporting restictions I believe) to allege that the High Court has said Binyam Mohamed, being held at Guantanamo, has been tortured by the US, and that the US have threatened to withdraw all intelligence help from the UK if the details of the torture are made known to the court.
You may want read Nick Robinson's blog on this:
http://www.bbc.co.uk/blogs/nickrobinson/2009/02/torture_allegat.html