URGENT London preppers recce opportunity

[Mandlaka]

Just found out about an old wartime bunker and tunnel about a couple of hundred yards from my home!
Apparently it's connected to a tunnel that leads about 4 miles to the town hall a few miles away. Useful info to know...
As to bugging out into that area of central Londonabad, I intend to keep as far away from it as possible as I am almost on the outskirts but the idea to check out the subterranean areas is great. Will pursue getting that book...