I'm just wondering if anyone knows what this was?
http://www.realtimetrains.co.uk/train/H32397/2018/12/14/advanced
My mate mentioned it had pretty strong lights pointing into the air what seems a little odd. Wish I had seen it :/
That RTT is the only movement I can see around 11:30 between Wolvercote junction and Tackley listing it as a Network Rail R.T.C
Looks like the National Measurement Train (yellow HST).