I was somewhat lost in a book, and not paying attention - but on the
way home from work on Saturday evening, on an eastbound Central Line
train at Chancery Lane, the driver took great pains to point out that
we would not be stopping at Bank.

And we didn't. The train slowed to the regulation 5mph, and trundled
through without stopping. Much to the confusion of people on the
train, and the couple of hundred people on the platform. I couldn't
hear any obvious alarm, or "Inspector Sands" PA from the platform, so
it didn't really look like the station was closed. Any ideas why this
might have happened? It would have been at about 19.10.