We're going to meet some friends at the Greenwich Observatory on saturday lunchtime. We live on the borders of Hertfordshire, Essex and North London. Does anyone have any good advise about the best way to get there (2 adults and 1 2 year old). We do have a car but DH says that he doesn't fancy driving all the way to Greenwich on a saturday morning. A friend have suggested driving to Canary Wharf, then DLR then a 10 min walk but alwhogh I wouldn;'t go as far as saying I dont trust said friend I do know from experience that he thinks everything takes 10 mins!!