Prince Harry has been spotted smoking from a shisha pipe onboard a yacht in Abu Dhabi.
The photograph shows the 30-year-old royal trying the flavoured tobacco on the boat, which was docked in the United Arab Emirates city’s marina for the Mahiki F1 Yacht Party.
Harry was pictured dressed casually with seven others as he smoked the hookah - which is legal - after watching Lewis Hamilton win his second Formula One World Championship.
World Health Organisation research into hookah pipes shows that the average session lasts around an hour - and in that time the smoker can inhale the same amount of smoke as from 100 cigarettes.
The image - released by London agency Clickstarpics and first published by Los Angeles website TMZ - comes after Harry became the first to congratulate Hamilton on his win over the in-car radio.
He told him: ‘Lewis, thank you very much for not making the British public sweat. You are a legend.’
The fourth in line to the throne, who last week enjoyed a successful three-day mini tour of Arabia - including raising almost £1 million at a charity polo match - spent last weekend enjoying himself.
With the great, the good and the fabulously wealthy flocking into the UAE, Harry was in his element, drinking and dancing into the early hours as well as posing for pictures with scores of admirers.
Social media such as Twitter and Instagram were awash with pictures of the partying prince earlier this week. One showed him cuddled up to a group of exotic young women, comically grimacing.
Another video showed the royal, his white shirt unbuttoned a straw hat perched on his head, launching into a wild dance on the deck of a super yacht.
One user posted a picture saying: 'Can't believe I just seen Prince Harry twerking and I didn't record it. Oh my god, can't believe it. What a guy!'
Harry was accompanied by one of his 'partying partners in crime', Adam Bidwell, an ex-London Welsh rugby playing stockbroker and former boyfriend of singer Katherine Jenkins.
He was also accompanied by the same Scotland Yard police protection officer who was pictured next to Harry in a jacuzzi at a pool party in the City of Sin.
Also in the official group staying in Abu Dhabi over the weekend was Harry's private secretary, Edward Lane-Fox, and a member of the Kensington Palace press office - although there is no suggestion either of them were on the yacht.
Other pictures to emerge from the weekend show Harry posing with a rapper and socialising at what is described in the Abu Dhabi social pages as the most 'star-studded destination' of the Grand Prix, Amber Lounge.
Harry stayed on to watch the Grand Prix privately after his official duties had concluded. His cousin, Princess Beatrice, and uncle, Prince Andrew, also showed up in Abu Dhabi over the weekend.
The release of the image comes two years after Prince Harry's infamous wild night in Las Vegas in August 2012, when he was pictured naked in a hotel room during a game of 'strip billiards'.
A palace spokesman for Harry declined to immediately comment when contacted by MailOnline.
