An 'extremely qualified' chief engineer onboard a £50 million superyacht died from electrocution after failing to isolate the power during repairs, an inquest heard.

'Dedicated' Roy Temme was working in a 'hot and sweaty' tiny compartment on the luxury 62.5 metre superyacht when he was fatally electrocuted.

The 47-year-old experienced 230 volts of electricity jolting through his body after failing to take the necessary precautions when working with live wires, an inquest into his death heard.

A colleague who found Mr Temme slumped in the enclosed compartment also experienced a mild electric shock when they touched his body.

Jason Pegg, acting senior coroner for Hampshire described the father-of-two as an 'extremely qualified' chief engineer, having served in the Royal Fleet Auxiliary before moving to a private yacht.