 On nationalisation in 1948 management of the line passed to the Western Region of British Railways.The line closed to passengers in 1960 and to freight in 1961.An unusual feature of freight operation on the line was the carriage of gauge slate wagons (provided by the GWR) on standard gauge transporter wagons between and Blaenau Ffestiniog where the wagons were off-loaded in the large station yard and their loads of dressed slate transferred to standard gauge GWR wagons for carriage back the way they had come then on via Manod and Bala.