Gordonstoun

Gordonstoun School is a co-educational independent school for boarding and day pupils in Moray, Scotland. It is in the north-west of Elgin. 
Admission is not just a matter of money. There is an interview and references and exam results are considered. It is one of the few full boarding schools in the United Kingdom today.
It is famous as the secondary school which King Charles III went to as a teenager. His father, Prince Philip, went there as a teenager.