Hertsmere

From Wikipedia : Radlett railway station is on the Midland Main Line in England, serving the village of Radlett, Hertfordshire. It is 15 miles 17 chains (24.5 km) down the line from London St Pancras and is situated between Elstree & Borehamwood to the south and St Albans City to the north. Its three-letter station code is RDT.

From Wikipedia : Potters Bar railway station serves the town of Potters Bar in Hertfordshire, England. It is located on the Great Northern route, 12 miles 57 chains (20.5 km) north of London King's Cross on the East Coast Main Line. The station is managed and served by Great Northern, with Thameslink services also calling in the peak hours.

From Wikipedia : Elstree is a large village in the Hertsmere borough of Hertfordshire, England. It is about 11.5 miles (18.5 kilometres) northwest of central London on the former A5 road, which follows the course of Watling Street. In 2011, its population was 5,110. It forms part of the civil parish of Elstree and Borehamwood, originally known simply as Elstree.