He believed that the businessman had been strangled and then hung from the shower rail.
Mr Berezovsky was one of several Jewish oligarchs in the Kremlin inner circle during Boris Yeltsin’s presidency and was key in the election of Vladimir Putin.
He became a fierce critic of Mr Putin and sought political asylum in the UK after surviving two assassination attempts.
The 67-year-old multi-millionaire was found dead on the bathroom floor in his Ascot home with a ligature around his neck last year. The original Home Office post-mortem concluded that it was a suicide.
The hearing at Windsor Guildhall heard how Mr Berezovsky was clinically depressed and often talked of committing suicide after losing his legal claim against Mr Abramovich in August 2012.
