The duke complained to the Independent Press Standards Organisation (Ipso), the newspaper industry regulator, that the paper breached Clause 1 (Accuracy) of the Editor’s Code of Practice in an article published in April last year.

The Mail on Sunday’s story was headlined “Drugged and tethered… what Harry didn’t tell you about those awe-inspiring wildlife photos”.

In it, the article said the images of a rhino, lion and elephant – posted on Harry’s Instagram account to highlight Earth Day – “don’t quite tell the full story”.

Earth Day is an annual global event to celebrate the world and encourage greater understanding about the environment and climate change.

The newspaper reported the duke had “notably avoided explaining the circumstances in which the images were taken”.

It added that followers of Sussex Royal, the Instagram account the duke shares with wife, Meghan, were unable to see a rope around the hind legs of the elephant because of the way the photo was edited.

In its ruling, Ipso said the prince had stated that “he had not misled the public by failing to explain the