A man has admitted to stabbing his mother to death with a kitchen knife, police have said.

Criston Preddie called police himself and told officers he had lost his temper after an argument earlier that day, and approached 46-year-old Arlene Williams on the settee with the weapon, the Metropolitan Police said.

The 28-year-old pleaded guilty at the Old Bailey on Friday to manslaughter with diminished responsibility, the force said.

Officers went to the home at Tennyson Close in Enfield on September 28, and police said Preddie told them he had killed Ms Williams.

Preddie will be sentenced on June 5.

Detective Inspector Joanna Yorke, from the investigation team at the specialist crime command, said: "This is a very sad case which has left the extended family devastated and they continue to be supported by specially trained officers."