Rights for a UK Citizen Raised Abroad

Hi,
My wife and son are UK Citizens. They both have never lived in UK. My son is 12 years old.
We would like our son to go to high school in UK. However, we don't have what his rights are. Where can we find detailed information about UK citizens raised abroad?

Thanks

If he is a full British Citizen, he has full rights as any other British citizen.

Is the whole family coming to the UK or only the child?

You have posted your question in the 'Claiming Benefits' sub forum, so unclear what your ultimate question is. Kindly clarify if it is benefit related or family migration related.