DS2 felt that both exams went well. There was a ten minute break in between, in which he had the opportunity to go to the loo (accompanied by an invigilator) but didn't need to, so just stayed in his seat in the exam room.
He said the worst part was finishing each exam half an hour early (even after checking and rechecking his work). A part of me worries that perhaps he missed something out, but he insists he read through every page to check.
I'm feeling a bit calmer today, I think it feels easier now that he has actually started.