Everything seems to match Quercus ilex. The 2 types of leaves, serrated and entire, the trunk, the wide spread of it's top? What are you having doubts about? If you can look at the leaf undersides, they should be much lighter colored than the leaf tops.

Yup. Q Ilex is very common down there and has naturalised happily.

Thanks guys

I had doubts a) because images I saw on-line of the leaves didn't seem to match, b) Google Lens.

The leaves are quite variable. Some youngsters almost look like olives and the silveriness is changeable.