In December, Abdel Hakim Belhaj, Libya's military commander who worked with NATO forces during Operation Unified Protector, said London played a role in his illegal rendition and torture while he was held in Libya's Abu Salim jail, The Guardian newspaper said.
Blair told BBC Radio 4's World at One program he was sure the operation would be investigated "as it should be," and referred to comments made by then-Foreign Secretary Jack Straw, who said London is opposed to unlawful rendition.
"We were opposed to unlawful rendition. We were opposed to any use of torture. Not only did we not agree with it; we were not complicit in it and nor did we turn a blind eye to it," Straw said.
"As far as I know [the government] kept to that position," Blair said.
Meanwhile, a U.S. federal judge blocked a Freedom of Information Act request by members of Parliament for records documenting British involvement in CIA renditions, The Guardian reported Wednesday.
Judge Ricardo Urbina said he withheld the information on the grounds that members of Parliament are part of a "foreign government entity."