Culturally European? Not so. Our culture has more similarities with USA than Europe (or doesn't language count?). I'm English first, British a poor second and European only because of Geography (and, at a push, I acknowledge because UK is a member of the EU, too).And the pound may be irrelevant as a sign of sovereignty but (as you admit, Grab) is immensely significant in terms of actual sovereignty. Why do we want to ally ourselves to a failing currency? I predict that it will fall to pieces within 5 years.
I detest this concept of Europe as a political rather than purely geographic entity.