During a period of heightened scrutiny for Britain's 117-year-old domestic spy agency MI5, Ken McCallum has made no fewer than three public apologies since becoming Director General in 2020. In 2023 he said he was "profoundly sorry" after an inquiry into the 2017 Manchester Arena attacks, which killed 22 concert goers, found MI5 had missed "actionable intelligence" which might have prevented the attack.
Last December McCallum said in a statement he accepted that his organisation had mistakenly withheld