If London has a front door, this is it — and there's a Brompton dock right behind it. Step off a train from the north, grab a folder, and you're moving before the taxi queue has shuffled forward a metre. The real magic is the round trip: ride into town, fold the bike, and carry it free onto your next train like a piece of luggage. It's the busiest, most-used dock in the network, which is its blessing and its curse — register the night before rather than fighting the app on a cold platform, and you'll be away in seconds.