The New York Times reports that after years of promising leads gone cold, the final piece of evidence which led to Osama Bin Laden was found by interrogating detainees in Guantanamo Bay, Cuba. Given the rough interrogation techniques which were in use at the prison camp, the killing has reopened the debate over torture, and whether it is ever justified.

Blogger David Allen Green, amongst others, asks whether the Bin Laden scenario may amount to an exception to the “otherwise absolute rule” that torture is wrong. I would like to pose a slightly different question: on the basis of current UK law, would it have been lawful for UK authorities to use information obtained under torture to capture or kill a known terrorist?