Some more info to add to this topic. Spoken to someone who used to be an apprentice down within the anchor and this is what he told me: "I walked the length of most of the tunnels back in the day. One came out at a large manhole close to the Reference Library via a deep shaft + numerous steel steps. As an apprentice I had to fit trunking to the side of the shaft down to heavy transformer / generating equipment in the base. "
if you find turds in there then you've lifted the wrong iid