A BRITSH banker who went to Winchester College has been found guilty of murdering two Indonesian women in Hong Kong in a gruesome case which shocked the Chinese financial hub.

Rurik Jutting was convicted unanimously by a nine-person jury at the High Court on Tuesday of killing 23-year-old Sumarti Ningsih and Seneng Mujiasih, 26.

Prosecutors said Jutting was using cocaine while he tortured Ms Sumarti for three days and then slit her throat.

Jurors were shown graphic smartphone video clips of the torture filmed by the 31-year-old, who stuffed her body inside a suitcase that he left on the balcony of his luxury apartment near Hong Kong's famous Wan Chai red-light district.

Ms Seneng Mujiasih was killed days later.

Jutting faces a mandatory life sentence.

He had pleaded not guilty to murder when his trial began two weeks ago but attempted to plead guilty to manslaughter on the basis of diminished responsibility.

Prosecutors rejected that argument but the jury could have considered it on its own.

Rutting, a Cambridge University graduate, was working at the Hong Kong office of Bank of America-Merrill Lynch in structured equity finance and trading at the time of the killings.

He had offered both women large sums of money to go to his apartment to have sex.

Ms Seneng was in Hong Kong on a tourist visa after an earlier stay as a foreign maid. Ms Sumarti was officially on a maid visa but was working at a bar.

They were among Hong Kong's more than 300,000 migrant domestic workers, most of them women from Indonesia or the Philippines.