This is the modern version of my original 1990s suggestion. The route from Berwick to Edinburgh is one of the most scenic in the UK. This is because for most of the duration it runs along the coast and also there is a beautiful view of Edinburgh as you enter. The stations are Berwick upon Tweed, Dunbar, drem, longniddry, prestonpans, wallyford, musselburgh and Edinburgh Waverley. The route takes around 45 mins to complete on a high speed run. To and increase the distance I am including the north Berwick branch. The trains The class 800 is rapidly becoming the dominant high speed train in the UK it is a fascinating train and it is part of the Hitachi a-train family. I believe it is by mode but please correct me if I'm wrong. These trains have a maximum speed of 140mph and a maxim service speed of 125 mph. The class 91 was built in the 1990s for the ecml and is an icon but sadly are slowly being scrapped. These have the same speed as the azumas. Finally the 385 can operate local services out of Edinburgh Waverley they have a top speed of 100 mph.