Hadley Wood - any questions?

Yesterday I spent 20 minutes around Hadley Wood station. And I have questions. Is Hadley Wood London's only open air rail station sandwiched between two sets of tunnels? Whichever way you look at Hadley Wood there are proper tunnels disappearing into a steep slope. Could be the only place like this in London, but is anywhere else as tunnel-bound? I wonder what proportion of Londoners have ever been to Hadley Wood? Not many, you'd think, given how off-piste it is. If you count every Londoner who's ever driven from Cockfosters to Potters Bar maybe it reaches 5%. But actually the East Coast Main Line passes through, so that means everyone who's ever taken the train from King's Cross to towns and cities up north has spent a few seconds here, so maybe a majority of Londoners have been? What's the point of just one platform having step-free access? Hadley Wood station has two platforms in general use, only one of which has a ramp to make it step-free. I know they installed it because it was…