Private candidate
（重定向自Private candidates）
A private candidate, also known as an external candidate, in the UK examination system is a person who enters an examination but is not enrolled as a student at the centre (school or college) where he or she sits the exam. They may have trained themselves for the exam, been taught privately, or studied at an institution which is not a registered examination centre. Centres are not compelled to accept private candidates, and many do not.