For the Pilot (Aircrew) medical, it was done with the Medical Department at OASC and consisted of body measurements/anthropometrics taken (height, weight, then specific limb measurements in a special measurement chair, such as sitting height, functional reach etc.) for the ejection seat limits, an ECG and a blood test, a hearing test, an in-depth eye test with an optometrist, and then a final chat with a doctor to go through medical reports and the outcome of the medical. I think that's everything, although I may have missed something!
As WSOp is aircrew I believe you'll do most (if not all) of the tests, but again I could be wrong.