Benjamin,
You can do the CAD test at CAA house for the bargain sum of £120.
It is a professionally run test and you will have the opportunity to familiarise yourself with the setup before commencing the test.
If you score between 4 and 7 on either of the axes (read more about these in other posts) you will then be given the chance over 3 runs of the test to obtain an average that is lower than 6 - this is the pass mark.
I have been involved in the research process since day 1 and have sat the CAD many times. I found the testing at CAA house the most unpleasant of these experiences for reasons that I am not quite sure.
If you pass you will be given a UK issued Class 1 medical - I await more informed opinion as to what the rest of JAA and EASA think about this.
G
