There is a distinct difference between a British Citizen and a British Subject. A British Citizen has free access to all parts of the UK. A British Subject may not. If you are a British Subject, you should check with the British Embassy in your country of residence. Incidentally, a British Citizen doesn't need a visa to visit the US but a British subject does.

It means that he is a British citizen. He lives in Britain.

The complete subject is "Vancouver, Canada" and the complete predicate is "is in British Columbia."

Become a British subject (citizen) then apply.

A registered British subject is a term used historically to refer to individuals who were citizens of the British Empire or Commonwealth. This term is no longer in use, as citizenship laws have evolved, and the concept of British subjecthood has been replaced by British citizenship or nationality.