That short notice reinstatement of the 08.20 probably means they found a relief driver who was available; you definitely did the right thing getting on the move when you did, though.

Surprised you had that trouble on the Underground, though - the signs are quite clear at the bottom of the main escalator down ( which leads to all three routes ); I'm guessing it was rather busy and people were stood in front of the signs at the first level down so you didn't see them?