MI5 has also apologised after handing over previously undisclosed material on the agent that too late for it to be investigated properly

Nine-year investigation paints highly critical picture of agency’s handling of double agent

MI5 has also apologised after handing over previously undisclosed material on the agent that too late for it to be investigated properly

The final report of Operation Kenova says the security service had "greater knowledge" of Stakeknife than it had first stated.