7F-082-002 MHA Wagon EWS 394133As the Merry go Round hopper coal wagons were reducing in numbers considerably, during 1997, surplus wagons donated their underframes to a fleet of ballast wagons for hire to the infrastructure maintenance companies. A total of 1,071 were so converted between 1997 to 2007, the later wagons having some detail differences to the number of vertical ribs on the bodies. Dapol are making models of the original batch of 400 wagons built at RFS Doncaster