& yes it did run; while I was not on it I did see it into Victoria.
But there was something amiss with whatever databases / feed both RTT and Traksy use concerning it as it disappeared completely from Traksy several times in the aftenoon after about 16:00 as I was looking at it for its timekeeping in order to meet some on it; while RTT went up to half an hour at least twice without updates from it, then jumping and back filling it all in; other trains in the areas surrounding the tour were reporting normally to both.
Before anyone dives in and says flaky data is normal, yes I know, but I've never come across just one single train so affected amid anything and everything around it reporting normally.