Home Secretary Theresa May is expected to announce a broad independent inquiry into how public institutions handled allegations of child abuse. Mrs May will give details of the probe as she makes a statement to MPs this afternoon.
Home Affairs committee chairman Keith Vaz described the loss of more than 100 official files relating to historic allegations of organised child abuse as being on an "industrial scale".
He told BBC Breakfast that he welcomed a letter from Mark Sedwill, the permanent secretary at the Home Office, outlining a a fresh review into the handling of the dossier.
The MP who raised the claims that a paedophile ring operated in Westminster during the 1980s said new allegations have now come to light.
Lord Brittan has defended his handling of a dossier alleging paedophile activity in Westminster when he was home secretary in the 1980s.
A 1980s dossier claiming paedophile activity at Westminster may have mysteriously gone missing but the questions still remain.