TV presenter Esther Rantzen says she is convinced by allegations by former BBC employee Sue Thompson and others that Jimmy Savile abused children. ITV1 is broadcasting an hour-long documentary about the star, called Exposure: The Other Side of Jimmy Savile, on Wednesday night. In it, Sue Thompson, who was a newsroom assistant at BBC Leeds, claims she walked in on Jimmy Saville indecently assaulting a teenage girl in his dressing room in the mid 1970s. After seeing the footage, Esther Rantzen, the founder of ChildLine, said she now felt a degree of guilt for ignoring "gossip" that surrounded the Top of the Pops and Jim'll Fix It presenter. Rantzen, who began presenting That's Life in 1973, told ITV1: "I feel that we in television in his world in some way colluded with him as a child abuser - because I now believe that's what he was." Get the latest headlines http://www.telegraph.co.uk/ Subscribe to The Telegraph http://www.youtube.com/subscription_center?add_user=telegraphtv Like us on Facebook http://www.facebook.com/telegraph.co.uk Follow us on Twitter https://twitter.com/telegraph Follow us on Google+ https://plus.google.com/102891355072777008500/ Telegraph.co.uk and YouTube.com/TelegraphTV are websites of The Daily Telegraph, the UK's best-selling quality daily newspaper providing news and analysis on UK and world events, business, sport, lifestyle and culture.