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. Coloured red on the Tube map, the line serves 49 stations over 46 miles (74 km), which makes it the longest Tube line. It is also one of only two lines on the Underground network to cross the Greater London boundary, the other being the Metropolitan line. One of London 's deep - level railways, Central line trains are smaller than those on British main lines.
essex town used to house the terminus of the london underground
Epping, Essex