Ipek built a multi-billion-dollar fortune in Turkey based on gold mining but left the country in 2015 after relations between the government and followers of U.S.-based Islamic cleric Fethullah Gulen soured. Ipek and two other men, Ali Celik and Talip Buyuk, who are said by Ankara to be high-ranking members of Gulen's organization (FETO), were arrested by Britain last year following extradition requests from Turkey.
A judge in November said that while he had serious reservations about the state of the rule of law in Turkey, he accepted that the men would receive a fair trial.
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