Kings Langley railway station is almost under the M25 motorway near Junction 20. It serves the village of Kings Langley, and the nearby villages of Abbots Langley and Hunton Bridge. The station is 21 miles north west of London Euston on the West Coast Main Line. The station and all services calling at the station are operated by London Northwestern Railway.
The station was opened in 1839.
Wikipedia https://en.wikipedia.org/wiki/Kings_Langley_railway_station
Official Website http://www.nationalrail.co.uk/stations/KGL/details.html
Coordinates 51°42'22.686" N -0°26'17.667" E