In a statement to the House of Commons on the Hillsborough panel report, the Prime Minister made a public apology that the report's findings are only now being made public.
David Cameron said the report found that 164 statements were "significantly amended", including the removal of 116 negative comments about the leadership of the police, to push the blame for the tragedy onto the fans.
Mr Cameron said the new evidence raised "must be examined", and the Attorney General would be considering it as quickly as possible.
David Cameron, South Yorkshire Police and Sheffield City Council have issued apologies to the families of the Hillsborough disaster victims.
Official documents relating to Britain’s worst sporting disaster, in which two Welshmen died, will be released today.