For one, your re-visit to the scene of disaster must have been awful!
For two, even with maps for reference that's one hell of a maze of interconnecting madness to follow, chunks of which I haven't personally seen, being a north London snob.
For three, just two tea drinking emojis in that entire odyssey, shameful.
That is really quite the labour of love and a chronicle for posterity. Very, very unlikely to be repeated either I'd guess. There's really too much there to make any comment that does justice to the effort put in over years of exploring and hours of writing it up and processing pics. Nothing but respect for your not giving up on the write-up too, I feel I'd have stalled far before the half-way point. It is definitely deserving of three more cups of tea and another read through.
😎🎩