The Duke of Sussex filed a claim against Associated Newspapers Limited (ANL) on Wednesday afternoon.

It is understood the claim relates to an article published by The Mail On Sunday relating to issues on his family's security on Sunday 20 February, under the headline "Revealed: How Harry tried to keep his legal fight over bodyguards secret".

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

His wife Meghan, Duchess of Sussex, previously brought a successful privacy claim against ANL over articles that reproduced parts of a handwritten letter to her estranged father, Thomas Markle.

Meghan was awarded £1 nominal damages and an undisclosed sum, which she donated to charity.

The publisher was also ordered to issue a front-page apology and pay for Meghan's legal costs.

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

He has brought 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.

The duke wants to fund the security himself, rather than ask taxpayers to foot the bill after he stepped down as a senior member of the Royal Family.

Read more:
Prince Harry begins legal fight over security

His lawyers say he and his family are "unable to return to his home" because it is too dangerous.

The duke says his private protection team in the US does not have access to UK intelligence information which is needed to keep his wife and children safe.