Birkdale School is a Christian independent school for boys aged 4 -- 18 in the city of Sheffield , South Yorkshire in England .
Is a member of the Headmasters ' and Headmistresses ' Conference .
Birkdale School is a Christian independent school for boys aged 4 -- 18 in the city of Sheffield , South Yorkshire in England , and is a member of the Headmasters ' and Headmistresses ' Conference .