Duff gen by the current owner or maybe he was being disingenuous. The voltage is 240v.
Cable size is 35mm about as far as they can judge. It's not 440m...more like 800m as my measurement was as the crow flew.
They calculate a 60v drop at 60A load (the size of the cut-out). So a 10KW electric shower is out of the question
Cable size needed probably 135mm. Or a service alteration. I think the latter.
There is no earth or if there is it is reliant on the sheath which is not 10mm in equivalence. No earthing of any of the internal copper water pipes.