In the UK, the creation of a national network of telephone boxes commenced in 1920 starting with the K1 which was made of concrete, however the city of Kingston upon Hull is noted for having its individual phone service, Kingston Communications, with cream coloured phone boxes, as opposed to classic royal red in the rest of Britain. Also, 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.