romney hythe and dymchurch railway Northern Chief is a 4-6-2 steam locomotive that operates on the Romney, Hythe & Dymchurch Railway (RH&DR) in Kent, England. The Romney, Hythe & Dymchurch Railway is a narrow-gauge steam railway that runs for 13.5 miles (21.7 km) along the southeast coast of England, from Hythe to Dungeness. Northern Chief locomotive was built in 1925 by Davey Paxman & Co. Ltd. and has been an iconic part of the Romney, Hythe & Dymchurch Railway's fleet. It is one of several locomotives that operate on the line and is known for its distinctive appearance and historical significance.