I'm trying to find the best (and cheapest) way to get there. We have a 6 zone travel card. (with these cards you can't start your journey until 9:30) We're staying near Catford Station which is in zone 3.
At some point we have to leave the London transport system and get on a train, but where? I've tried different websites which give various journey options involving 4 different transfers. (some take 4 hours each way) Has
anyone done this trip and can recommend a route? The castle is open from 10 to 6 so we'd like to get there as soon as possible to make a day of it.