A model maker from the UK who goes by the name of Kingsway John makes fantastic models, mostly of British Transport vehicles and dioramas, but he also specializes in creating models of those famous red phone kiosks. Have fun looking around his site.
Sir Giles Gilbert Scott, designer of the iconic red telephone booth. The K6 became a recognized fixture in most of the country.
If you're interested in purchasing a real one here's a company that sells them, and does repair and restoration: BritishBits
And to read more about the booths, the Wikipedia entry is pretty good.