Get called in by the nurse who will take your weight,Height,Urine test(don't forget to take a pot of pee with you)do a quick ECG they take a swab of your nose and groin too,And ask you a few questions,Then you fill in a health questionnaire and then you go into see another Nurse who runs you through what happens when you come into hospital,Then she sends you to go get your blood taken and then thats it.
That's what happened at mine.