Scotland Yard tonight launched a full investigation into allegations that Conservative politicians were members of a paedophile ring which abused children in care the 1980s. Operation Fernbridge will centre on the alleged historic sexual abuse of children at Elm Guest House in ... south-west London. Residents of a nearby care home run by Richmond Council claim they were sexually assaulted at the property by a network of prominent individuals, including Tory MPs, who used their connections to escape justice. The allegations are one of several lines of inquiry being considered by specialist detectives at the country's biggest force as a result of information supplied to them by Labour MP Tom Watson. Mr Watson - who alleged widespread phone hacking at the News of the World before police began a new inquiry - urged Scotland Yard to re-open the evidence file on Peter Righton, a former child care consultant who was convicted of importing illegal homosexual pornography in 1992. Saying that the file contained clear intelligence of a widespread paedophile ring", Mr Watson said at Prime Minister's Questions: "One of its members boasts of a link 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 files still exist, 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 Parliament and No 10."