Did my fair share of OP last year.
1>May have SEAB/Moe if you are unlucky
2>Pw teachers,some ordinary teachers from another cohort. eg
Current J2 teachers will make up the pw OP framework>to increase
infamilarity of students
3>You have to present in front of your audience(classmates)
and also the judges(teachers)
4>Try to get your classmates not to smile too much,they can
inherently affect your concentration and performance.
Since OP is approaching for you,I suggest you build rapport with
your teammates. In chemistry H2,if you learnt that anyway,p-p
orbital overlap results in the delocalisation of lone pair of
electrons on the pi electron system.
Teammates will lower your stress!!