yep , that makes sense now I have a starting point. My viewer has made the diagram a little fuzzy, but now I know what I am looking at.
Unfortunately, it has not enabled me to find a problem! All wiring buzzes out and the junction in the front passenger well looks OK. I have even disconnected the wheel sensors at the connectors in the passenger footwell and had that reported on the dash as well as ABS failure! This would mean that the ABS ECU is functioning to a degree I think as the signal from the sensors goes straight into the ABS ECU.
AAAAAAAARRRRRRRRRRRRRRRRRRRRRRRRRRRR!