Digging at S1 has continued, the last major part of construction in the system. It looked like the Lock Stock culvert had just been broken into, the concrete shoring up the sides was still wet. The tanks will overflow at this point to the river, it's starting to become a bit clearer how it's all going to work.
Last time I nipped in there a few weeks back, a PIR was somehow triggered that had never bothered before, was only when we headed over to the actual shaft it started shouting