Hardly ideal lighting, but you don't get many trains traversing Didcot's West Curve. On 8 October 2010, 950001 rounds the curve between Foxhall Junction and Didcot West Curve Junction with the 2Q08 08:25 Didcot to Banbury Network Rail measurement train. Although essentially built using a Class 150 bodyshell, this was purpose built as a test vehicle, rather than being converted from a former passenger unit.