The highlight of the Chinnor & Princes Risborough Railway's Diesel Gala on Sunday 17 October 1999 was the use of Railtrack Sandite unit 55024 (977858). It is seen here just having arrived on the line at Thame Junction, and accelerating past Horsenden Lane, towards Chinnor. I chose a side view from the nearby field to show off the unique livery. Plenty of detail for modellers in this picture. Note that the condition of the roof hardly matches the immaculate condition of the rest of the vehicle!