I ran from Green Park to Clapham Junction along Hyde Park and Victoria which was a nice run, but not at all necessary! The tubes were totally fine and even less busy on some days. Some lines like the Central Line had some issues, but this was one of few.
Even at Vauxhall they opened up a new area which made it easier and quicker for travellers to get to the tubes. A very nice feeling though, running across the Mall where yesterday the cycling circuit went through. Hyde Park was packed with people, having a walk alongside some beautiful nature.