It opened in 1978  and by 2006 it had carried 1 million passengers. It is open Saturdays 11:00–17:00 and Sundays & Public Holidays 11:00–16:30. Its primary purpose is to give mainly steam-hauled train rides to the general public on a 71⁄4 in (184 mm) gauge track. £25,000 has been donated to Amwell View School from the EHMR.
The current length of the track is around 1/4 of a mile and the journey time is 3.5 minutes. There are 4 steam locos, 2 petrol hydraulic and 1 battery electric belonging to the company which are in regular use. The site comprises a station with canopy and booking office, bridge, engine shed, tunnel, turntable, signal box (with ex London Underground westinghouse 'B' style lever frame from Hyde Park Corner), steaming bays, level crossing, water tower and workshop. Colour light signals and electro-pneumatic points operate every time the railway operates and are in the process of being computerised so that the system can be used without a human signaller required. A manual override function is included.