Officers also confirm a 31-year-old man has been arrested on suspicion of murder and is currently in hospital.

Two men who died after a stabbing at a business premises in central London have been named as a father and son. Terry McMillan, 58, from Chislehurst, Bromley, was pronounced dead at the scene after reports of multiple stabbings inside a commercial property in Long Lane, Southwark, the Metropolitan Police said.

On July 28, a stabbing at a business in Southwark, in central London, left two men dead and two others hospitalized, including the suspect. Police said a 58-year-old man died at the scene, while a 27-year-old victim died later in hospital.

Donald Trump made his remarks during a press conference in Scotland, where the president is on a four-day informal summer visit, and comes after a previous spat with Sir Sadiq Khan when he branded the mayor a "stone cold loser".