Geograph - photograph every grid square

A police box is a telephone kiosk, usually blue, located in a public place for the use of members of the police, or for members of the public to contact the police. Police boxes pre-date the era of mobile telecommunications; now police officers, carry two-way radios and/or mobile phones rather than relying on fixed kiosks. All boxes are now disused or have been withdrawn from service.
The police box was made famous by the BBC series Dr Who, who used one as his Tardis. Most remaining boxes are listed structures.