Fred, I thought I had made the point, although you say to RP that you have denounced your British nationality as far as UK is concerned you are still British.
Its the same in Spain, except for former Spanish colonies, including RP, ones not allowed to have dual nationality, but many people do.
The USA and probably many countries are the same, dual nationality is not allowed, so its not RP that's Mickey Mouse it's the UK that is different !