Sutton and Mole Valley lines via Epsom and Dorking (including the Bookham Branch) is known to commuters as the "Mole Valley Line" – seven out of the 15 stations are in the Surrey district of Mole Valley. The full title "Sutton and Mole Valley Lines" is used for the lines north of Epsom via Sutton. Confusingly, all Southern services that terminate or call at Sutton are branded as "Sutton and Mole Valley Line" services. The lines which form the route include (in order of construction): None of the lines leads directly to a London terminus, but services use the South Western Main Line to access
River Mole Ages and the river appears as "Amele" in Domesday Book and subsequently as "Emele" in 12th- and 13th-century Court Rolls. This name is probably derived from the Old English word "æmen" meaning "misty" or "causing mists", and the name of the River Ember probably has its origins in this name. The name "Mole" does not appear until the 16th century, first occurring as "Moule" in Harrison's "Description of Britain" of 1577. The antiquarian William Camden uses the Latinized form "Molis" in the 1586 edition of "Britannia" and Michael Drayton is the first to use "Mole" in his poem "Poly-Olbion" published