Oh and Heli-Jock,
It's been over a decade since. Did mine but if you can fly now, I can't imagine a North Sea operator would be too wrapped around the axle about these things. I've seen plenty of people who passed military aptitude tests hit capacity within days of starting the pilots course!
The best way to assess someone is to fly with them (AAC does it that way). There are quite a few different types of test, I know quite a few of the FW airlines use Compass. Other than that its just metal arithmetic and MDR.
Good luck and send them my way when you're done will you
