166221 Reading Traincare Depot takes the Long Marston line at Honeybourne station on 7 August 2015, as it works the 5Z11 09:27 Oxford Down Carriage Siding to Long Marston First Great Western ECS move. The Class 166s are having air con modifications carried out at Long Marston, and the usual course of action is for the driver of this inwards unit to return with a completed one. The sun briefly appearing through a small hole in the cloud here wasn't particularly welcome, as the lighting angle is virtually head on.