66152 Derek Holmes Railway Operator passes Challow on 29 November 2021 with the 3J43 02:53 Didcot Fuelling Point to Didcot Fuelling Point (via Ealing and Trowbridge) Rail Head Treatment Train, with 66151 bringing up the rear. I was glad the locos were this way round, as although 66152 is reasonably clean for a RHTT loco, the rear loco is absolutely filthy. The perfect combination of sun and snow was fairly localised, with the area to the west not only without any snow, but as can be seen from the dark clouds in the background, without much sun either!