A Russian oligarch embroiled in Britain’s most expensive divorce battle has won the right to keep his £350 million mega yacht out of the hands of his former wife. Farkhad Akhmedov has been given authority to sail away in the yacht Luna after it was impounded in Dubai as part of a bitter divorce battle with ex-Tatiana. The mother-of-two had previously won a freezing order on his worldwide assets after the oil and gas tycoon refused to pay her half his £1bn fortune following their split. But today an appeal court in the United Arab Emirates has ruled an earlier decision by a lower court in Dubai impounding the luxury vessel had been wrong.