Lord McAlpine is a senior Conservative peer and a former advisor to Prime Minister Margaret Thatcher.
He was mistakenly implicated in the North Wales child abuse scandal, after BBC Newsnight accused an unnamed "senior Conservative" of abuse. He was widely named on social media to be the person accused by the victim interviewed by the BBC.
McAlpine issued a strong denial that he was in any way involved, and stated that the allegations were wholly false and seriously defamatory. The victim interviewed by the BBC, Steve Messham, said he had mistaken the peer's identity.
The accusations led to the departure of BBC Director-General George Entwistle and ITV This Morning presenter Philip Schofield confronting David Cameron with the peer's name on a list of live on TV.