The individual admitted he was running a campaign which “involved the systematic dissemination of false and defamatory allegations” against Mr Nolan.
TV and radio presenter Stephen Nolan has received a six-figure sum in damages and an apology from an anonymous Twitter troll who made a series of defamatory remarks about him.
Mr Nolan said,”This individual has now admitted responsibility for what has been a malicious campaign, designed to undermine me and hinder my journalism.”
Mr Nolan, who presents regular shows on BBC Radio Ulster and Radio 5 Live, tracked down the individual who was behind the online campaign.