Gardenia, if you're close to N Dulwich station a good fallback for getting into the city is the 42. It starts at the bottom of Sunray Ave and although it's a small bus you can always get a seat, even on train strike days. It's not the quickest but if you've arrived at ND to find trains are cancelled it's probably easier than heading back to ED or P Rye on the 37. Also worth having a shortcut to the Network Rail live departures/arrivals board as it's usually more up to date than station announcements, even at LB itself.