Its Episode 9 of Londons Lost Railways, and also Im in north London walking from Seven Sis to Wood Green – the Palace Gates line. If this was an epsiode of Friends, it d either requirement to be called “The one with all the bridges”, or “The one with all the allowances” …
Download the Londons Lost Railways map right here: https://www.geofftech.co.uk/downloads.html.
Several many thanks to pictures by David Kirwin.
A lot more terminal info:.
Royal residence Gates – http://www.disused-stations.org.uk/p/palace_gates/.