My trip into Uni was more interesting than usual a couple of days ago, as the Victoria line was completely shut down for part of the day. I think there had been some king of flooding at a station which let to signalling problems (or something).
However, I manage to take an 'alternate route' which involved getting the underground-WAGN service from Highbury and Islington. This is a very funny old line which normally isn't used much at all. It's odd to see a normal-looking overground train travelling underground, and the platform is a very dated British Rail platform.