Sheikh Khalifa bin Zayed bin Sultan Al-Nahyan owns a list of luxury property in London longer than his name. And now we know exactly what and where that property is thanks to the Panama Papers. IBTimes UK headed to Mayfair to get a feel for just how much property Al-Nahyan owns in the city.

Al-Nahyan is emir of Abu Dhabi and president of the United Arab Emirates (UAE), the oil-rich Gulf state known for the lavish spending and ostentatious displays of wealth of its ruling class. He and his family are worth billions. The Forbes rich list puts his net worth at around £16bn ($23bn). Like any self-respecting member of the financial elite, he owns property in some of London's most exclusive postcodes — an empire of more than 250 properties worth in the billions, it is estimated.

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The 68-year-old was caught up in the massive leak of 11.5 million documents from the offshore services firm Mossack Fonseca, which helps its wealthy clients use tax havens. Tax avoidance is legal and Mossack Fonseca denies any wrongdoing. It believes it is the victim of hackers.

Through the Panama Papers, which were handed to the International Consortium of Investigative Journalists (ICIJ), Al-Nahyan and his family have been established as the beneficiaries of a number of companies assisted by Mossack Fonseca in the British Virgin Islands, a tax haven.

Using data from Land Registry, which has a database of foreign companies which own property in London, it is possible to cross-reference the Panama Papers and find out which are owned by Al-Nayhan through his many offshore firms.

He owns whole blocks of residential and commercial properties right in the heart of London, where property acts as a safety deposit box for the cash of the richest men and women in the world. It is regarded as a "safe haven" for capital, untroubled by political and economic turmoil and offering decent returns.

The ICIJ contacted a UK law firm representing Al-Nahyan, which told them it was "unable to help" with comments. IBTimes UK has reached out for comment from Al-Nahyan through the UAE embassy in London.

Al-Nahyan owns most of prestigious Berkeley Square, according to the Panama Papers and Land Registry records, including the garden in the middle of it all. And he owns huge chunks of the surrounding streets of Mayfair, such as Bruton Street, Bruton Place, Hill Street and Hay's Mews.

Property prices in the area average at around £2m. According to Rightmove listings, that will get you a two-bedroom flat at best in Mayfair. Walk up to Oxford Street and Al-Nahyan owns a row of retail properties, home to the likes of high street favourites Zara and BHS. On New Bond Street, his retail space houses Chanel, the high-end fashion store.

"Don't even try," said the buying agent and property expert Henry Pryor when asked to estimate the total value of Al-Nahyan's property wealth in London. "The 2016 world Monopoly championships have been won and convincingly so. His Royal Highness has the hotel on Park Lane (well a pub in Hill Street!) and as many houses as you can fit in Mayfair.

"He is easily the winner and totting up the total value would be a waste of time. Kick over the board, stamp out and console yourself with the unanswered question that every loser asks: 'But, is he happy?' Too bloody right and the only man who is happier is his agent who quietly put this portfolio together."

"You cannot put a justified value on these properties — these are vast swathes of property in some of the most expensive parts of London with untold value," said private buying agent Nicholas Jaffray of Palmstar, who emphasised that his firm does not work with Al-Nahyan or comment on its clients.

Al-Nahyan's offshore companies Berkeley Square Holdings Limited, Bruton Properties Limited, Mayfair Commercial Limited, Oxford & City Holdings Limited, Sloane Street Commercial Properties Limited, Sloane Street Residential Properties Limited, Clementine Commercial Properties Limited, De Vere Estates Limited, Ham Ridings Limited, Forestway Properties Limited, Hans Crescent Estates Limited, Knightsbridge Green Limited, Barrow Hill Limited, Knightsbridge Commercial Estates Limited, Marylebone Properties Limited, Clementine Investments Limited. Source: ICIJ/Panama Papers

The Panama Papers offer a rare insight into who owns what in London's luxury property market. The owners of London's most expensive real estate often use offshore vehicles, such as trusts or shell companies, to avoid taxes such as stamp duty and for reasons of privacy.

Heavy foreign investment in London property fuelled the market for years, particularly in the wake of the financial crisis, when cheap sterling drew in overseas wealth. But the prime property market has weakened recently.

The UK Treasury has hiked taxes on expensive and additional properties, as well as those owned by offshore structures. The European Union referendum is causing some political uncertainty. And traditional markets for luxury London property, such as the resource-rich Gulf monarchies, are being hit by falling commodity prices, in particular oil.

From Land Registry, here is the list of properties owned by the offshore companies who, according to the Panama Papers, are ultimately owned by Al-Nahyan.