I've always been interested in the London Underground but this puzzle revealed quite a few things that I knew nothing about (questions A & G for example). I'll have to investigate some of those places the next time I'm up in London. A really fun puzzle.
It took me an hour or so of enjoyable research to find all the answers. Often puzzles like this can be let down by various ambiguities, but this one doesn't seem to suffer from that and I passed the geochecker at my first attempt.
I decided to pick the cache up today after doing the CITO at Newlands Corner. I parked at the suggested spot to find that some other cachers had had a similar idea: Bleached & Dyed Westie were here to pick up the first in the series while IceColdUK was here for the same as me.
I'd read AndyR's log and was expecting to have trouble finding the cache, but IceCold spotted it as soon as we arrived.
#1566 TFTC (+fave point)