Hopefully you will be getting my emails again now. The IT problem was at my end. Apologies about that.
With reference to the website photograph showing a cabinet at Ivybridge. That is (was) a standard WR signalling equipment cabinet (with its door missing) and the box inside is a 240v to 110v signalling power supply transformer. Looking at the position of cabinet I think it was the power supply point for the former Ivybridge distant signal. Those tended to use local public mains power supplies with a battery backup at the signal itself. hope that answers that question.
Chris Bellett Retired S&T Engineer CRS Member