a few in my year group started coming into school with their leavers hoodie instead of the normal blazer, and were sat in the exam with just their school shirt on, I guess no. My head of year told us we have to come to school in our uniform for the next exams or they cant let us sit the exam, its not their choice, its the exam boards. We wore own clothes on the english lit paper 2 exam just before the one week holiday due to own clothes day for the whole school, but got told to take jackets off and place them at the back. Which was super annoying as we could probably cheat better in our school blazer than a Jacket... for someone like me who wore a thin see-through top had to awkwardly sit there freezing cold. was so damn annoyed.