Well, the crisis at work seems to be over for the time being, or at least dying down enough to let me add in the last few travel updates:
Monday night, my tube from Edgware Road to Waterloo departed two minutes late, caught up a minute to arrive just one minute late. I was able to catch my intended connecting train to Hersham, and that was a minute late (though only outside of the TfL network, so doesn't count).
Yesterday morning, I came into work much earlier to help deal with the issues there. I was rewarded with a train which arrived a whole minute early in Waterloo. This didn't let me catch an earlier connecting tube, but the tube was running on time, so no delay.
Yesterday evening, a faulty elevator made me miss my tube, holding me back some six minutes - and the tube itself that I caught in the end was a minute late. This made me miss my connecting train, though the train I was able to take was at least on time. Still, that makes 26 minutes and £65 in total.
This morning, the train was again a minute early arriving into Waterloo. Again, it did not mean I could catch an earlier tube but again that tube was on time, so no delay and no charge.
No news of note that I've been able to catch related to TfL. Hopefully, normal service at Signal Failure has now resumed.