K6 Red Telephone Box

The red telephone box, a telephone kiosk for a public telephone designed by Sir Giles Gilbert Scott, is a familiar sight on the streets of the United Kingdom, Malta, Bermuda and Gibraltar. Despite a reduction in their numbers in recent years, the traditional British red telephone box can still be seen in many places throughout the UK, and in current or former British colonies around the world. The colour red was chosen to make them easy to spot.
The red phone box is often seen as an iconic British symbol throughout the world.

In 1935 the K6 (kiosk number six) was designed to commemorate the silver jubilee of King George V. K6 was the first red telephone kiosk to be extensively used outside London, and many thousands were deployed in virtually every town and city, replacing most of the existing kiosks and establishing thousands of new sites. It has become a British icon, although it was not universally loved at the start. The red colour caused particular local difficulties and there were many requests for less visible colours. The red that is now much loved was then anything but, and the Post Office was forced into allowing a less strident grey with red glazing bars scheme for areas of natural and architectural beauty. Ironically, some of these areas that have preserved their telephone boxes have now painted them red.

I believe that this is a K6 I could be wrong though lol.