One of the strangest items left by Doctor Smith, in the courtyard of the cottage, is a mysterious blue box – believed to be a ‘police box’.
The typical police box contained a telephone linked directly to the local police station allowing patrolling officers to keep in contact with the station, reporting anything unusual or requesting help if necessary. A light on top of the box would flash to alert an officer that he/she was requested to contact the station.
The design that later became the most well-known was created for the Met by Gilbert MacKenzie Trench in 1929. Officers complained that the concrete boxes were extremely cold. For use by the officers, the interiors of the boxes normally contained a stool, a table, brushes and dusters, a fire extinguisher, and a small electric heater.