GCSE exam seat

I was wondering if is 5 days before my first exam and I wanted to know if they would still let me change my seat. This is because my planned seat for my science exams is the same seat I had earlier in the year for another exam and there was a leak in the roof that disrupted my entire exam. I have anxiety so I didn’t want to cause a fuss while changing seats mid exam. Do you think it will still be ok for me to change my seat now before the exam