70801 passes Challow on 29 November 2021 with the 6M50 07:59 Westbury to Bescot engineers train, which on this occasion terminated at Hinksey. There was a good covering of snow at home, but when I learned that there wasn't any at Swindon, I realised that the previous evening's snowfall had been very localised, and I was quite prepared for there not being any at Challow. However, after a slightly slippery drive, I was pleased to see that not only was there some snow, but the sun was gradually breaking through the high cloud!