Like the 19th and early 20th century Glaswegian boxes, the London police boxes had a light at the top of each box, which would flash as a signal to police officers indicating that they should contact the station.
19세기 글래스고에 있던 박스들처럼 런던 경찰 박스에는 각 박스의 꼭대기마다 경찰서와 연락하라고 경찰관들에게 지시하는 신호를 보내는 불이 있었다.