A man who entered the grounds of Windsor Castle, where Britain's Queen Elizabeth is spending Christmas, is being held under the Mental Health Act, London's police said on Sunday.
The 19-year-old from Southampton in southern England did not enter any buildings, and security processes were triggered within moments, the Metropolitan Police said in a statement.
"The man was taken into custody and has undergone a mental health assessment - he has since been sectioned under the Mental Health Act and remains in the care of medical professionals," the police said.
