Court filings show the Duke of Sussex filed a claim against Associated Newspapers Limited (ANL) on Wednesday afternoon.

It is not known which of the publishers’ titles – which also includes The Mail On Sunday and MailOnline – the claim relates to and there is no indication which article is complained of.

The duke is currently bringing privacy claims against News Group Newspapers, which publishes The Sun, and Mirror Group Newspapers, now Reach, which publishes The Mirror, over alleged phone hacking and unlawful information gathering.

Harry, 37, is also involved in litigation against the Home Office over his security arrangements when he is in the UK.

He is bringing a High Court challenge against a Home Office decision not to allow him to personally pay for police protection for himself and his family while in the UK.

Harry wants to bring his son Archie and baby daughter Lilibet to visit from the US but his lawyers say he and his family are “unable to return to his home” because it is too dangerous.

It follows an incident in London in the summer of 2021 when his security was compromised after his car was chased by paparazzi photographers as he left a charity event.

His wife, the Duchess of Sussex, previously brought a successful privacy claim against ANL over articles which reproduced parts of a “personal and private” handwritten letter to her estranged father Thomas Markle.

Meghan was awarded one pound nominal damages, along with an undisclosed sum which she donated to charity, after winning her case.

ANL was also ordered to issue a front-page apology and pay the duchess’s legal costs.

An appeal by ANL was dismissed by senior judges in December last year.

A spokesperson for the duke said: “I can confirm the duke has filed a complaint against Associated Newspapers Limited.”