But, what makes these four so special?
Brief History
The humble telephone kiosk has been in existence, in varying forms, since 1884. At this point telephone boxes were usually wooden cabinets, sometimes called 'silence cabinets', which could be found in shops and stations.
When the General Post Office took over responsibility of Britain's telephones from the National Telephone Company, in 1912, plans to standardise telephone boxes were introduced.
The first of these new designs, the K1, was of concrete construction and began appearing in 1921. This was followed by an updated K1 the following year.
In 1926 the iconic K2 design was introduced. This kiosk had a scarlet enamelled lion, crown, shield and unicorn motif, below the roof section, and was designed by Sir Giles Gilbert Scott. It was made of cast iron and painted bright red.
The K3 design was an adaptation of the K2, but constructed with concrete.
The K4 was introduced in 1930 and used the design of the K2, but was expanded to include a stamp machine and post box. Only 5 examples of the K4 remain and are all Grade II listed.
