

This realised plans that had been delayed by the war, when construction stopped and the unused tunnels were used as air-raid shelters and factories. After World War II, the line was expanded considerably into the new suburbs, taking over steam-hauled outer-suburban routes to the borders of London and beyond to the east. It was later extended to the western suburb of Ealing. The line was opened as the Central London Railway in 1900, crossing central London on an east–west axis, as the third deep-level Tube line to be built after electric trains made them possible.

One of London's deep-level railways, Central line trains are smaller than those on British main lines. It is one of only two lines on the Underground network to cross the Greater London boundary, the other being the Metropolitan line. Printed in red on the Tube map, the line serves 49 stations over 46 miles (74 km). The Central line is a London Underground line that runs through central London, from Epping, Essex, in the north-east to Ealing Broadway and West Ruislip in the west.
