43013 leads the New Measurement Train past Shorthampton on 17 July 2014 with the 1Q15 09:05 Derby RTC to Derby RTC (via Oxford). As Realtime Trains was showing the normal path for this HST working as cancelled, and replaced by an identically timed supposedly loco hauled working, I expected either a 31 or 37. It has been pointed out to me that this alteration may because on this occasion the formation includes some Mk 2 vehicles and the OHLM test coach (formerly Test Car 3 Mentor).