373-811A HKA Bogie Hopper 'National Power' Blue No. 300621The HKA Bogie Hopper Wagons originated from JMA Coal Hoppers which were ordered by National Power in the mid 1990s. After being acquired by EWS, many of the JMA fleet were fitted with new bogies and the resulting wagons received the TOPS code HKA with their use subsequently expanded to aggregate traffic too. It is these wagons that form the prototype for this Graham Farish model and the two variants inner or outer wagons can be modelled to suit