66800 provided additional capacity for the Saddleworth School exodus on the same day although in this case it is the normal service working which happens to be scheduled to leave Uppermill at that time. As often happens with this type of destination display, the fast shutter speed has lost the text altogether.
NIKON CORPORATION NIKON D50, f/4.2 @ 105 mm, 1/800, ISO 400, No Flash