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The billionaire president of the United Arab Emirates filled the water tanks of his 18th-century mansion with Evian mineral water, court documents have claimed.

Sheikh Khalifa bin Zayed al-Nahyan, the Emir of Abu Dhabi, had his £60 million Berkshire home extensively renovated, with tanks filled with water shipped from Evian, France, where the royal family owns several other homes.

The grade II listed mansion near Windsor Great Park was bought for a then record £18m in 1989.

The sheikh has been accused of “profligacy” by the former managers of his £5.5 billion London property empire, as part of a legal battle in the High Court.