Hi folks,
Many thanks for all your input, it's very much appreciated.
I have been very busy yesterday and today trying to find a root cause. Having checked every fuse, relay and electrical connector, I can testify that there are no dodge contacts. Having stripped out the ignition switch everything looks good. In fact this car is cleaner than my year old VW.
I have made sure everything is back in place and the battery is on constant conditioner but it still refuses to turn over on the key.
Power is live both to fuse box and starter/alternator, all lights on the dash are correct with no faults on screen but turn from I to II and the headlights stay bright, the fan and radio go quiet as expected but no crank.
I do not have a plug in diagnosis tool so think it's time to ship her off to the local specialist in desperation, unless there is anything you guys and girls can think of that may provide a lifeline.
Tricky.