Prince Harry’s legal battle against The Sun’s publisher will continue to a High Court trial, a judge has ruled.

The Duke of Sussex, 38, alleges he was targeted by journalists and private investigators working for News Group Newspapers (NGN) titles and the now-defunct News of the World from the mid-1990s until 2016.

Mr Justice Fancourt ruled on Thursday that Harry can not bring his claim against News Group Newspapers (NGN), publisher of The Sun and now-defunct News Of The World, in relation to phone hacking.

However the judge said the rest of his claim, relating to other allegations of unlawful information gathering such as use of private investigators, could be tried.

In his written ruling, the judge concluded: “I am satisfied that there is no reasonable prospect of the duke proving at trial that he did not know and could not with reasonable diligence have discovered facts that would show that he had a worthwhile claim for voicemail interception in relation to each of the News of the World and The Sun.”

“He already knew that in relation to the News Of The World, and he could easily have found out by making basic inquiries that he was likely to have a similar claim in relation to articles published by The Sun.”

He refused to allow the duke to amend his case to rely on a “secret agreement” between Buckingham Palace and senior NGN executives.

Lawyers for the duke said there is evidence to support the agreement, including emails between executives and palace staff in 2017 and 2018.

NGN disputed such an agreement and denied any unlawful activity took place at The Sun. During a hearing in April, NGN asked Mr Justice Fancourt to throw out the duke’s case, arguing it was brought too late.

Anthony Hudson KC had argued there was an “extraordinary delay” between Harry launching his claim in 2019 and first raising the issue of the “secret agreement”.

A spokesperson for NGN said after the ruling: “The High Court has today, in a significant victory for News Group Newspapers, dismissed The Duke of Sussex’s phone hacking claims against both the News Of The World and The Sun.

“As we reach the tail end of litigation, NGN is drawing a line under disputed matters, some of which date back more than 20 years ago.

“In arguing his case, the Duke of Sussex had alleged a ‘secret agreement’ existed between him/Buckingham Palace and NGN which stopped NGN from asserting that the duke’s claim had been brought too late.

“The Judge, Mr Justice Fancourt, found his claims in relation to the alleged ‘secret agreement’ were not plausible or credible. It is quite clear there was never any such agreement and it is only the Duke who has ever asserted there was.

“Mr Justice Fancourt then dismissed the duke’s phone hacking claims against both the News Of The World and The Sun on the grounds that the claim had been brought too late.

“This substantially reduces the scope of his legal claim. The exact nature and scope of any trial of the remainder will be the subject of further hearings.”

Mr Justice Fancourt ruled in May that a claim by actor Hugh Grant over alleged unlawful information gathering – other than allegations of phone hacking – can go ahead to be tried next January.

Grant, 62, is suing NGN in relation to The Sun only, having previously settled a claim with the publisher in 2012 relating to the News Of The World.

NGN has previously settled a number of claims since the phone-hacking scandal broke in relation to the News of the World, which closed in 2011, but has consistently denied unlawful information gathering took place at The Sun.

The claim forms part of six legal battles for the former working royal which are ongoing at the High Court.

His civil litigation has seen him bring claims against three major newspaper publishers over allegations of unlawful information gathering, as well as legal challenges against the Home Office in relation to his personal security.

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