The Chatham Main Line is a railway line in England that links London Victoria and Dover Priory / Ramsgate, travelling via Medway (of which the town of Chatham is part, hence the name). Services to Cannon Street follow the route as far as St Mary Cray Junction where they diverge onto the South Eastern Main Line near Chislehurst. Thameslink services to Luton run in parallel from Rainham to Rochester, diverging once across the River Medway at Rochester Bridge Junction onto the North Kent Line via Gravesend and Dartford. A shuttle service operates on the Sheerness Line which starts at Sittingbourne.