Threadcromancy!
I present: The commemorative 150 years of the Tube, restored and running it's original route. Snapped at Farringdon.
The odd looking unit number 12 was a very early electric electric locomotive, which seemed to be helping the steam train for some reason. Also snapped was a maintenance train of some sort.
You can tell that I was a little caught out for the first pic, as the lens on my phone was smeared with finger grease
Annoyingly the train was running really quite fast, which my phone couldn't quite cope with, though I'm pleased with my panning
ability luck for the side-on photo, even if there is still a smear on the lens.
The random not-as-old pic is only in there because I think it is a good photo