Police wanted false claims that a Westminster paedophile ring existed to be true, Harvey Proctor has claimed.
The ex-Tory MP was accused of being part of the ring by Carl Beech, who is now serving an 18-year jail term for fabricating a series of claims of rape, torture and murder by innocent, well-known names from the military, security services and politics.
A 16-month probe into the false claims ended in 2016 without a single arrest, and former High Court judge Sir Richard Henriques condemned the police operation.
He identified 43 police failings in a review, and found the warrants to raid the homes of Mr Proctor, D-Day veteran Lord Bramall and Lady Diana Brittan, the widow of former Home Secretary Leon Brittan, were "obtained unlawfully".
However, the Independent Office for Police Conduct (IOPC) found no evidence of criminality or wrongdoing in the probe.
But Mr Proctor has called the police watchdog's report "a pathetic attempt to excuse the police for their mistakes".
"I believe they [Met Police] wanted it to be true for their own self-promotion within the police force," he told talkRADIO's Julia Hartley-Brewer.
"Their incompetence and their negligence has done a great deal of harm."
He continued: "Lord Bramall's wife died without knowing that her husband was completely innocent of all these ridiculous charges."
Daniel Janner QC, whose late father Lord Janner was also accused by Beech, said the IOPC had "overlooked clear evidence of serious failings and negligence".
However, the IOPC said their report, due to be published today, "contains 16 learning recommendations that advocate systemic change so this never happens again".