HAA Hppr Wgn 3 Pack BR CoalSecHOR R60065 Hornby HAA Hopper Wagons, Three Pack, BR Coal Sector Era 8 Built from 1964 to 1977, HAA wagons were built as method to move coal more efficiently, particularly with the aim of improving to supply of coal to power stations. It was intended that trains of these wagons could run in a continuous loop from the colliery to the power station and back, with machinery I place to allow loading and unloading at slow speeds. In reality it was often the