What is the K2 that was first seen in London in 1926?

The K2 kiosk was Britain's first red Telephone Box. It was the winning design from a 1924 competition to find the design for a national kiosk. Designed by British architect Sir Giles Gilbert Scott, the K2 was introduced in 1926 and over the next nine years some 1,700 examples were installed mostly in London. The design of the K2 features many influences of classical architecture. Just over 200 examples remain on British streets and these are given Grade II listing status by English Heritage.

There are 208 separate listings for the K2 kiosk with English Heritage, although a number of those listings represent multiple kiosks in a single location. The total number of surviving K2 kiosks is approximately 224 (about 13% of all K2 kiosks). Of the eight kiosk types introduced by the General Post Office, the K2 was the fifth-most populous type introduced, but the second-most populous type in terms of surviving kiosks.