steam locomotive doctor syn at hythe station on the romney hythe and dymchurch railway steam locomotive doctor syn at hythe station on the romney hythe and dymchurch railway The Romney, Hythe & Dymchurch Railway (RH&DR) is a narrow-gauge heritage railway in Kent, England. It runs for 13.5 miles (21.7 km) from the Cinque Port of Hythe via Dymchurch, St. Mary's Bay, New Romney, and Romney Sands to Dungeness, close to the Dungeness nuclear power station and Dungeness Lighthouse.