How late can students be entered into exam so

[User700800]

Friends dd has decided she wants to re sit an exam. Can she still do this obviously she and her parents are aware it will cost more.

The deadline for exam entries for this May/June has already passed. She could find an exam centre who will let her take it next year?

Which subject is it and what level? She may find the syllabus and balance of coursework/exam has changed in the interim.