Much to my surprise, Clapham Junction is on the new tube map; a darting spur to the south east as part of the London Overground.  

I have a long history of catching trains, or changing lines up the Junction, having lived in South London for most of my adult life, but even so it never ceases to surprise me just where you can get to from there.  One thinks of it only as a  nexus for commuter lines into London from all over the south, and I've certainly done the usual thing of commuting to various jobs, weekends away in Brighton, and even changing to Waterloo for the one time I've used the Eurostar to Paris for a surprise weekend away...but you can also get to less logical places like Watford to change for trains Northward, or Olympia for exhibitions with my mother, and even once, I clearly remember the utter surprise of waiting for a train into Waterloo and hearing all stations to Penzance annouced on the neighbouring platform. While I'm waiting for my train to Brighton on Friday evening, I check that this wasn't just imagination, and yes, there's only one train a week going to Cornwall, but the fact remains that you can do it, and take your bicycle if you ask nicely first.  One day I'll do it - takes forever,  but in the strange world inside my head it has a Famous Five on a Daring Adventure feel to it, a train ride for I Spy books and cheese sandwiches wrapped in greaseproof paper, of girls in green blazers and pigtails carrying leather satchels, watching the city give way to fields as they head off for summer holidays foiling smugglers on the Atlantic coast.