unfortunately not all NAAs see things the same way as the CAA and might not accept a visiting pilot flying a non-EASA aircraft on an EASA licence.
That is undoubtedly true but, since the question related specifically to a "G reg permit aircraft" and the CAA have issued a clear and unambiguous statement covering exactly that subject, I struggle to see the relevance.
As an aside, it is difficult to see by what authority EASA is able to determine that their licence may be used on aircraft that they do not regulate. Whether an EASA licence may be used on a non-EASA aircraft is a matter
solely for the state in which the non-EASA aircraft is registered.