British banker Rurik Jutting was so consumed by his personality disorders and addictions that he was not in control of his actions when he killed two women in his Hong Kong apartment, a psychiatrist told his trial on Tuesday.

Mr Jutting, 31, has pleaded not guilty to two murder charges, instead pleading guilty to manslaughter on grounds of diminished responsibility - which was rejected by the prosecution.

Cambridge graduate Mr Jutting is accused of murdering Sumarti Ningsih, 23, and Seneng Mujiasih, 26, two years ago, slashing their throats after saying he would pay them for sex.

The trial has heard he tortured Ms Ningsih inside his apartment for three days before killing her and stuffing her body in a suitcase found on his balcony.

The prosecution grilled defence witness Richard Latham, a forensic psychiatrist from London, as they sought to argue Mr Jutting was in control of his decisions at that time.