Kingston Communications has 500 kiosks around its 120 square mile network area, 250 of these being K6s. A K6 is the classic Hull ‘ cream telephone box’, which was introduced from 1936 and designed by Sir Giles Gilbert-Scott. Unlike BT’s red kiosks, Hull’s cream boxes do not have a crown symbol over the door. This is because the city’s telephone service has always been independent of the Post Office (which ran the UK telephone service prior to the creation of BT in 1984). Six of these K6s are now listed buildings. K6s are manufactured from cast iron with wooden doors. Kingston Communications has, wherever possible, a policy of preserving its unique cream kiosks. Those that are vandalised are broken down and used as spare parts to ensure the maximum number of them can be maintained.