The Eastern Region was a region of British Railways from 1948, whose operating area could be identified from the dark blue signs and colour schemes that adorned its station and other railway buildings. Together with the North Eastern Region, it covered most lines of the former London and North Eastern Railway, except in Scotland. By 1988 the Eastern Region had been divided again into the Eastern Region and the new Anglia Region, with the boundary points being between Peterborough and Whittlesea, and between Royston and Meldreth. The region ceased to be an operating unit in its own right in the 1980s and was wound up at the end of 1992.

Marylebone station is a Central London railway terminus and connected London Underground station in the Marylebone area of the City of Westminster. On the National Rail network, it is also known as London Marylebone and is the southern terminus of the Chiltern Main Line to Birmingham. An accompanying Underground station is on the Bakerloo line, sited between Edgware Road and Baker Street stations in Transport for London's fare zone 1.