I spoke to soon, looks like I have the dreaded radiator leak, a few drips found at the front near side is this what you first see?
Not had a new rad before and car now 4 years old so out of warranty as anyone had to pay themselves for a new radiator.
The Consumer Rights Act allows the user to claim up to 6 years for a latent defect in a vehicle & on your side is the known history of many Rad changes to CX cars, confirming a latent design / material defect
So Mike, stand your ground, you shouldn't be paying !