I’m in Calgary Alberta and the Armarda has spent all its life in Alberta.My Maxima needed a new radiator at about 160K miles, when the upper tank cracked. It didn't look anything like this when we pulled it out. I don't think I've ever seen a radiator look like that. Maybe something tied to different weather? I'm in the southwest, so mostly warm and dry here. Where are you located? Maybe this is more of a snow / bad weather thing?
Another Expat 😀Yep, that would do it. Don't get that problem here in SoCal....we're lucky to get any rain here!!
Where in the UK are you from? I was born in the London suburbs, in the Hounslow area. We immigrated when I was young, but we still own the family home in a town called Feltham (one street over from where Freddy Mercury used to live!!).