Hi Jack Brownbill
The medical involves: breath test, urine drug test, height, weight, sound test, sight test, making sure you can reach up high, touch your toes, move your head left & right etc, reflex test (where they hit your knees and your legs move), then they ask you about any current medication you may be taking, and make sure you bring a letter from your doctor about your vacinations (hep a & b, rubella, chicken pox etc). It's really easy, and they tell you on the spot if there are any issues.
Good luck!!