 Rhyl Miniature Railway opened on 1 May 1911 and still runs, but it closed during the Second World War, whilst Lakeside Miniature Railway remained open.The line therefore claims to be the oldest continuously running gauge railway in the world.The line originally had two steam locomotives of the Bassett-Lowke Class 10 'Atlantic' design, named "King George" and "Princess Elizabeth", they were later supplemented by "Katie", an 0-4-0 side tank built by that pioneer of the minimum gauge Sir Arthur Heywood.