The Western district consists of the single original W1 postal district. The area that it covers is high-density and so has been subdivided into a number of smaller postcode districts. When districts are used for purposes other than the sorting of mail, such as use as a geographic reference and on street signs, the W1 subdivisions continue to be classed as one 'district'. In June 2000, there was a recoding of the area, with the W1M, W1N, W1P, W1R, W1V, W1X and W1Y districts being replaced.