Typically you’d go into your hall and there’d be rows of tables with envelopes and teachers/volunteers/invigilators on. One table would be labelled A-C surnames it something like that. This may vary form school to school but just find yer damn table and from there you can ask for your envelope. Timings vary a huge amount. Some schools open between 7-9 usually (mine at 9.30am) but it’s best to be on the safe side and check your school’s website. If you’re not sure, text a friend or turn up at 10-11ish. Good luck for your results!! I know I’m bricking it!