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 fast swimming mayflies and riffle beetles. The beautiful demoiselle ("Calopteryx virgo") disappeared from the River Mole during the 1960s owing to deteriorating water quality, but has since recolonised. The white-legged damselfly ("Platycnemis pennipes") is also found along the river and the downy emerald ("Cordulia aenea") is found between Box Hill and Leatherhead. The Mole is one of only three locations in England where the river shingle beetle ("Meotica anglica") is found. A nationally scarce species which is locally common on the River Mole is the greater dodder ("Cuscuta europaea"). The Mole catchment area includes twelve Sites of Special Scientific Interest