66517 & 66508, 17.56 Bletchley flyover-Bescot (6Y55, 18L), Victoria bridge
66517 brings up the rear of the 17.56 Bletchley Flyover
to Bescot 6Y55 ballasting train with 66508 leading the train in the distance. This type of working is more usually associated with Sundays on the WCML so I was pleased that I had spotted it on RTT and that I made an effort to walk out after dinner to capture it.