Newsnight report 'wrong to go out,' says BBC head George Entwistle
10 November 2012 Last updated at 10:01 GMT
A BBC Newsnight report in which an abuse victim accused a former Tory politician of sex abuse should not have been broadcast, BBC director general George Entwistle says.
Lord McAlpine, although not named on Newsnight, was wrongly identified on the internet as the alleged abuser at care homes in Wales in the 1980s.
The former senior Tory has said the claims were "wholly false and seriously defamatory". Mr Entwistle gave an unreserved apology to Lord McAlpine.
Mr Entwistle said an internal investigation was under way into what went wrong with the Newsnight investigation.