373-850D HTA Bogie Hopper Wagon EWS No.310538Expected Delivery Sep Oct 2026 (Subject to Change at Manufacturer's Discretion). The HTA Bogie Hopper Wagons were introduce by EWS to carry large volumes of coal, replacing the merry go round coal hoppers some of which had been in service since as early as 1964. More than 1,000 HTAs were built in York by Thrall between 2001 and 2004 and a distinguishing feature of the new design was the lack of buffers. Instead, buckeye couplings were fitted, and the