> "Because the TBMs are so large and unwieldy, two of them—named Phyllis and Ada—were left buried in the ground near the new Farringdon tunnels."

There's a movie plot in that, but I'm not sure if it's a "mad scientist destroys London with TBM" plot, or a "heroic genius saves London from zombies with TBM" plot, or a "Bruce Willis foils terrorists in London with TBM" plot.

I guarantee those machines get referenced in a movie / book in the next decade :-)