Wired in the brake switch and the brake fail circuit on the two master cylinder caps. The entire loom forward of the bulkhead is now wrapped in spirawrap. There are separate earth points for the front lights either side of the car. Also managed to get the car started as well. Seems that there is some problem with the fuel filter as it appears to have an airlock. One way to get around this would be to relocate the filter so it can't trap the air. This is for further investigation.
Fitted the rear fog light but I'm not happy with it. I'll prefer a flush mount one I think, the wiring would be hidden then.Hopefully another sunny day tomorrow :-)