The officer, who has not been named, was near Trafalgar Square with the woman when he saw the St John ambulance. He approached the crew, who were assisting the London Ambulance Service (LAS) on one of the busiest nights of the year, and told them to take the woman home. When they refused, he identified himself as a police officer. According to a health source, he persisted and asked the crew to phone London Ambulance control.