A little bit more information for you all to ponder. I collected the car this afternoon from the shop and had a really good report on the engine etc. The shop said they had test driven the car and she was still warm so I guess that was true. Within a mile of leaving the car started to overheat and I pulled in and stopped just as the needle touched the red. I just could not get in any sooner because of the road and it would have been suicide to stop.
I had the shop come out and their mechanic let it cool off, topped it up with about 1.75l water from a 2 litre bottle started her fine and drove back.
He took her out for a test drive of 8 miles and she was fine. Got her back to the shop and let her sit with the heater fan off and engine on tickover. The secondary fans came on OK and she behaved as normal.
I have let the shop keep her for a few more days as I want them to do a few cold starts and run ups to see if this happens again.
My own feeling is that they forgot to connect the fan sensor but i was wondering if there was any chance of any damage especially after such a good report on the engine beforehand.
Many thanks to anyone who thinks about this and makes a comment.
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