Mark Burrows and I were on site today. Jay Hirst was "unavoidably detained" when his car unfortunately broke down on the way to site.
I disconnected seven wires from the base of the CU4 radiator fan control unit, as Mark had found the conduit containing the cables leading to it was badly corroded. Mark was able to disconnect the conduit without breaking the elbow joint at the CU4 end, and we marked the cables then pulled them out of it, fortunately without damaging them. We now need to fabricate some new conduit and re-insert the cables. In No.1 cab, we finished identifying the bunch of severed cables behind the cab desk, and they can now be extended and connected to the switches.