Fitted the new radiator
Had a call at 0840 from the dealers telling me it was in, picked it up at 9 and got on with it, not too bad a job, a couple of little clips need sorting properly, but that will wait a week or two.
One oddity, after fitting and checking everything, went to fill the header tank with just water (I thought I'd flush the system a couple of times before putting coolant in) and the float just rose to the surface, completely detached from the spindle ! So back to the dealers in the clio and pick up a new tank. Easily fitted
After 3 flushes and no sign of leaks, 5 litres of pink in, top up with a merest smidge of water and test drive... no problems to report
Heater works (very hot), no leaks, 86 air con on, 88 air con off, have to be stationary with 3500-4000 revs with air con off for nearly 6 minutes before fans kicked in at 92. Back home, ATF checked (as I loosened the bolt it started to seep so I reckon its good), coolant level is good but still quite warm. Will allow to cool before checking again.
So as Chris has said by text ... "Sorted" and we'll be departing for Scotland first thing in the morning .. only a 10 hour drive
Many thanks for all the offers of help, advice and even cars, all very much appreciated. OOF at its best