A Newsnight report which led to a Tory peer being wrongly implicated in child sexual abuse should not have been broadcast, the BBC's director general says, as he admits he did not see it before broadcast.

The BBC is urged by MPs to act quickly to restore confidence after a Newsnight report led to an ex-senior Tory being wrongly implicated in child sex abuse at Welsh children's homes.

The BBC's director general, George Entwistle, resigns in the wake of Newsnight's child abuse broadcast.