Network Rail Harsco RGH20C rail grinders DR79273 & DR79263 wait at a red signal at Challow on 24 September 2021, whilst heading west as the 10:22 Reading Triangle Sidings to Chipping Sodbury. This being a Friday, there were a number of such track machine moves, and just 25 minutes later, Harsco YZA Multi Purpose Stoneblower DR80302 passed by in the opposite direction.