The RMB is owned by the Railway and runs in the formation of almost all service trains. Seating up to 44 visitors the vehicle regularly earns its keep by providing accommodation for Cream Teas and Ploughman's Lunches on selected days throughout the year. At other times the gas-boiler provides constant supplies of top-up piping hot water for the on-train trolley service which provides an at-seat refreshment service.
Between January and April 2010 the vehicle was at Cranmore for a 10-year heavy overhaul and significant body work refurbishment (which cost over £42,000). 
- Builder
- Wolverton
- Class/type
- BR Mk.I RMB
- Built year
- 1959
- Status
- Operational
- Wheel arrangement
- 4-w bogies