E postcode area continue to be commonly classed as one 'district'. The E postcode area contains two non-geographic postcode districts for high-volume business users, E77 and E98. The Eastern District Office is on Whitechapel Road and was the eastern terminus for the former London Post Office Railway, which has been mothballed since 2003. The railway ran to the Paddington Head District Sorting Office. The E20 postcode has been used fictionally as the postcode on the television soap-opera series "EastEnders" since 1985. However, it became a real postcode in 2011, when it was created from within the E15 postcode for the new Olympic Park,
EastEnders: E20 idea of executive producers Diederick Santer, who wanted a show where regular "EastEnders" characters would be in the background, and John Yorke, who wanted to improve the portrayal of teenagers in "EastEnders" and to get younger people writing for it. The show's writers, all newcomers aged between 17 and 22, were selected through a writing competition, and created the series at a BBC summer school. The theme tune was also selected through a competition, promoted on BBC Radio 1. The show primarily operates as a standalone series but also cross-references storylines of the main soap, and features cameo appearances from