A FAR-RIGHT extremist accused of killing MP Jo Cox had accessed a Wikipedia page about Tory MP Ian Gow who was murdered by the IRA.
A court heard on Monday that gardener Thomas Mair (53) screamed "This is for Britain" when he killed Mrs Cox in a "cowardly" attack.
Mair allegedly repeatedly shot and stabbed the 41-year-old Labour politician outside her constituency surgery in Birstall, near Leeds on June 16, at the height of the EU referendum campaign.
Opening his Old Bailey trial, prosecutor Richard Whittam QC told jurors Mair attacked the mother-of-two as she walked to meet constituents in a library.
He was allegedly heard by several witnesses to shout repeatedly "Britain First".
During the attack, a 77-year-old local man risked his own life in an effort to save hers, the court heard.
Bernard Carter-Kenny was stabbed once by Mair with the same knife that he used to stab Mrs Cox, the prosecutor said.
Mr Whittam told jurors that Mair carried out his "pre-meditated murder" for an ideological cause.
The court heard that he had used the computers at the same library in the weeks leading up to the killing.
On June 13, he looked at the Twitter and Wikipedia pages for Mrs Cox, and the Wikipedia page for Ian Gow, whose killing by the IRA in 1990 made him the last sitting MP to be murdered until that point.
He also looked at information on .22 gun ammunition, right-wing politicians, white supremacy group the Ku Klux Klan and the Waffen-SS.
Mair has denied Mrs Cox's murder, possession of a firearm with intent to commit an indictable offence and possession of an offensive weapon - a dagger.
He has also pleaded not guilty to causing grievous bodily harm with intent to Bernard Carter-Kenny on the same date.
