A specialist ballast carrying wagon. They deposit ballast by side tipping. The first 200 were built by Thrall Europa, York in 2001. This livery was short lived as Railtrack failed and became Network Rail in October 2002. They put vinyls over the RAILTRACK before repainting them. The final 100 were built in Romania in 2004 with the yellow Network Rail livery. From 2023 a programme to convert at least 250 to Hawks was instigated see https://paulbartlett.zenfolio.com/jnayhawk