Speaking under parliamentary privilege at Prime Minister's Questions, Labour MP Tom Watson asked David Cameron to urge the Metropolitan Police to re-examine "intelligence suggesting a powerful paedophile network linked to Number 10."
"The evidence file used to convict paedophile Peter Righton [in 1992], if it still exists, contains clear intelligence of a widespread paedophile ring," Watson began.
"One of its members boasts of his links to a senior aide of a former Prime Minister, who says he could smuggle indecent images of children from abroad.
"The leads were not followed up, but if the file still exists, I want to ensure that the Metropolitan Police secure the evidence, re-examine it, and investigate clear intelligence suggesting a powerful paedophile network linked to Number 10."
The Prime Minister said he would "look very carefully and see what the Government can do to help give him [Tom Watson] the assurances he seeks."