[Interesting how this could have been either of two possibilities until the seventh letter. Producing two station names from one set of clues might be a challenge for the future ...]
[Raak] Absolutely the best strategy .. and I hasten to add that I was unaware when I posted letter seven that I was narrowing it down to just the one station. Never mind - I'll be more open-minded in future :-)
[Everyone] I suggest also that someone provide a "my whole is...." with a more or less cryptic clue. See Tuj's one for Turnham Green (yes, I got it in the end, derr....) which is very much in keeping with traditional riddle-making and kind of rounds the whole off quite nicely.