[peterljohnson55]

Thanks everyone for your replies. Seems I first need to visit the repairer and tell him the story, with a focus on the inhibitor switch. Whether he will accept that as a warrantable repair is another matter, but let's hope so. I think I have a good case. Saw them on ebay for $75+, plus fitting, which I dont want to pay. Anyway, it is happening more often now so I thnk the switch is definitely on its way out.
Peter

Thanks again ot all, and thanks for a great resource for discussion.