Sir Jimmy Savile's alleged catalogue of abuse could have spanned six decades and included around 60 victims, police said tonight.
The scandal has mushroomed since ITV screened a documentary in which five women alleged they were abused by the late DJ and broadcaster and now Scotland Yard say there are allegations stretching between 1959 and 2006.
ITV News Correspondent Damon Green reports:
Scotland Yard is pursuing 340 lines of inquiry in the Savile abuse case and so far 12 allegations of sexual offences have been officially recorded but this number is increasing, police said.
Metropolitan Police detectives are in contact with 14 other forces as the number of allegations against the former DJ continues to rise.
Meanwhile, Savile's former employers, the BBC, have been sucked into the scandal after it emerged that Newsnight abandoned an investigation into the alleged abuse. The organisation has also come under fire with claims that staff were aware of the Jim'll Fix It presenter's behaviour and failed to take action.
But according to the Mail on Sunday, Newsnight producers were desperate to see a letter from one of the alleged victims, Fiona, who appeared in the ITV documentary, that would verify her claims that Surrey Police had dropped its investigation into her alleged abuse because of Savile's ill-health and "senility".
The letter was not produced, and that was a "contributory factor" in the Newsnight investigation being dropped, the newspaper said.
The newspaper said it was handed a supposed copy of the letter last week by Fiona but described it as "unquestionably a fake", citing the fact that it says she was interviewed by police in 2006 even though the inquiry did not start until May the following year and it contains a Surrey Police crest that was not in use at the time.
The force also issued a statement saying the letter was not genuine, according to the newspaper.