Senior MI5 figures were criticised in the report by deputy investigatory powers commissioner Sir John Goldring.

Agent X had used his status to coercively control his then girlfriend, including attacking her with a machete MI5 gave evidence based on "lies" to three courts while defending a violent neo-Nazi spy whose abuse was uncovered by the BBC, a damning official report has found. The report, by the deputy investigatory powers commissioner Sir John Goldring, heavily criticises a series of senior MI5 figures and their organisation. He finds that one senior MI5 officer lied repeatedly, while another misled his own colleagues and lied about what he was told. The conclusions confirm the BBC's revelation in February last year that MI5 lied to the courts, something the security service vehemently denied. Sir John's investigation was ordered by the prime minister in September after MI5's explanations about what happened were rejected as deficient and unreliable by the High Court. His new report will plunge MI5 into crisis and could result in contempt of court proceedings or even a criminal prosecution. "MI5 recognises without hesitation the seriousness of our failings in these proceedings," said MI5 Director General Sir Ken McCallum.