Mr Hamilton-Jewell, 57, said he was disgusted that Lord Butler's report did not single out anyone for blame. "Butler says no single person is directly responsible," he said. "But, whether it's Blair on the political side or [John] Scarlett on the intelligence side, someone has to be ultimately responsible. The arrogance of Blair is extraordinary - he won't apologise." He also criticised Lord Butler's backing of Mr Scarlett in his new role as head of MI6.