OK - getting somewhere now. Changed out the ABS sensor and have cured the ABS problem - All working again.

MB Doc, you were spot on with the Throttle actuator. The mechanic did some testing and found it is loosing the programed settings. They would set it up, take it for a test drive and find it had lost it's setting on return. So unless I can fix it myself, I'm looking at reasonable bill for that part.

And you were right about it being the cause of the cruise control issues too. Cruise was working reasonably tonight, but that won't last with the throttle valve going out.

Does anyone know what normally fails - Are they repairable??

Thanks again