I saw a woman leap off my London to Horsham train at Coulsdon South today (last Oyster station out of London on that route) to touch out and then leap back on board before the doors shut, then attempt to buy a single from the guard to travel to the next stop, Merstham. Is this leaping off the train and back on thing the only way to do it if you are using Oyster and then going out of London?
