Comedian Alan Davies has apologised to Lord McAlpine for naming him in relation to false child abuse allegations made against the Conservative peer.
Lord McAlpine's lawyers are in the process of suing everybody who wrongly linked the former Conservative MP to historical allegations of child abuse, including those who mentioned the claims on Twitter.
Tonight QI regular Mr Davies tweeted to his followers:
I've just written to Lord McAlpine to apologise for re-tweeting his name in relation to false allegations following a BBC investigation
The claims were sparked by a Newsnight report that did not name Lord McAlpine but referred to a senior Conservative from the Thatcher era, leading to the peer being wrongly identified online.