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The Maidstone line is a railway line in Kent, England.[1][2] It diverges from the Chatham main line at Swanley Junction and proceeds down the Darenth valley to Otford junction[3] (where the Bat & Ball line[3] divides towards Sevenoaks). It continues via Borough Green & Wrotham and Maidstone East to Ashford, where it joins the South Eastern Main Line.[4]

Maidstone line
Kent Railways.svg
The Maidstone line, shown with other railway lines in Kent
TypeSuburban rail, Heavy rail
SystemNational Rail
South East England
Termini Swanley
Ashford international
OwnerNetwork Rail
Rolling stockClass 375 "Electrostar"
Class 465 "Networker"
Class 466 "Networker"
Class 700 "Desiro City"
Track gauge1,435 mm (4 ft 8 12 in) standard gauge
Electrification750 V DC third rail
Route map
Swanley Junction
Eynsford Tunnel
828 yd
757 m
(never opened)
Lullingstone Airfield
(never opened)
Eynsford Viaduct
over River Darent
20-32 Eynsford
22-52 Shoreham
(Otford Junction 1904–1929)
Bat & Ball
26-79 Kemsing
29-52 Borough Green & Wrotham
Offham Siding
34-61 West Malling
35-64 East Malling
37-43 Barming
former Preston Hall Tunnels
33 yd (30 m) & 54 yd (49 m)
39-76 Maidstone East
Week Street Tunnel
98 yd
90 m
Wheeler Street Tunnel
358 yd
327 m
42-59 Bearsted
45-02 Hollingbourne
47-36 Harrietsham
49-11 Lenham
53-11 Charing
55-61 Hothfield Halt
Ashford West
59-19 Ashford International
Ashford Steam Centre


The line was built by the London, Chatham and Dover Railway from their first line (the Chatham main line). Upon the creation of the South Eastern and Chatham Railway the original Ashford terminus was closed in 1899 and services diverted to the South Eastern Railway's Ashford station. The line was electrified in 1939 (750 V DC third rail) to Maidstone East by the Southern Railway prior to World War Two. Electrification between Maidstone East and Ashford was completed in 1961 under the BR 1955 Modernisation Plan.


Traction current is supplied at 750 volts DC via the Third Rail. The supply for this is overseen by Paddock Wood Electrical Control Room.[3] Signalling is Track Circuit Block with multiple aspect colour light signals throughout, controlled by Ashford IECC.[3] The line is double track throughout.


Services on the line are run by Southeastern. Services run to London Victoria and Ashford, or Canterbury West with some peak services to London Blackfriars.

Additional services through London will be introduced as part of the Thameslink Programme.


  1. ^ Network Rail (Apr 2001). Southern Appendix. Module SO. p. 1/12. A0260A03. Retrieved 2012-01-12
  2. ^ Quail Map 5 - England South & London Underground [pages 6,7 & 11A ] February 1998 (Retrieved 2012-01-12)
  3. ^ a b c d Network Rail (Apr 2001). Southern Appendix. Module SO. p. 1/64. A0260A03. Retrieved 2012-01-12
  4. ^ Network Rail (Apr 2001). Southern Appendix. Module SO. p. 1/54. A0260A03. Retrieved 2012-01-12
  • Yonge, John (October 1994). Gerald Jacobs (ed.). Railway Track Diagrams – Volume 5 England, South and London Underground (1st ed.). Exeter: Quail Map Co. ISBN 1-8983-1907-3.

Coordinates: 51°16′40″N 0°31′22″E / 51.2778°N 0.5228°E / 51.2778; 0.5228