Littlestone: Thanks for the link to the update - god knows how I missed it! I must have just skimmed over the picture when reading. It looks like the cable goes underneath the original ground surface (from the earlier diagram), which would mean it's not actually in the hill and Neolithic material but underneath it in hitherto undisturbed natural layers, but then I seem to recall the diagram shows the tunnels going up and down all over the place so maybe I'm wrong? It does look like a wide trench but I have no idea what geo-cabley things require for size!
I have to admit I'm a fence-sitter at the moment, but it's good to see people so passionate about sites like this.
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