800002 & 800001 pass Uffington on 5 May 2017 with the 5X31 10:17 Swindon to Reading West Junction test run. This was running nine minutes late, due to the previous westbound trip from North Pole IEP Depot having left London 35 minutes late. This late running was fortunate, as I had only just arrived at Uffington's new footbridge. This immaculate pair of white liveried bi-mode units certainly stand out against the green foliage, which is something that unfortunately will not be the case with the dark green production units that will soon be commonplace on this line. Also, it seems that a pair of five car units is a perfect fit for this particular location!