On the fourth day of being operated by Colas, and the second day on which the sun decided to make an appearance, 66846 passes Uffington on 24 October 2013 with the 6M50 07:55 Westbury to Bescot engineers train. This is the site of Uffington loops, hence the wide track formation, and the redundant signals in the background. The loops were removed after the section from Challow to Wantage Road was quadrupled in the early 1990s.