Footage of a British banker ­torturing one of the two Indonesian ­women he is accused of murdering will be shown to a jury in Hong kong today.

Rurik Jutting, a former Bank of America Merrill Lynch ­employee, told the court yesterday that he was not guilty of the murders of Sumarti ­Ningsih, 23, and 26-year-old Seneng Mujiasih, “by reason of diminished ­responsibility”.

He pleaded guilty to manslaughter and to preventing the lawful burial of a body.

The high-flying graduate of Cambridge University and Winchester College called police to his apartment in the early hours of Nov 1, 2014, where they found the bodies of the two women.

Mujiasih, a cleaner, was found lying in a pool of blood with multiple knife wounds, while the dismembered body of Ningsih was discovered hours later in a suitcase on the balcony.

The jury heard yesterday that Jutting subjected Ningsih to “increasingly ­cruel acts of violence” over the course of three days before she was killed.

Part of the torture was recorded by Jutting on his phone, Deputy High Court Judge Michael Stuart-Moore said, warning potential jurors that they would have to watch the footage.

“There is a particularly horrifying aspect of the case,” he said.