Mark,
I will be there tomorrow too, have done them once before.....
Don't worry
Read the paperwork they have sent you as you will be tested on this (no multiguess on this one)
Try the examples sent out to you (opened out cubes etc)
you will be tested on these sort of things......the cubes (not nice) number and letter sequences etc. Don't be worried if you don't finish them all it is designed to be tough !
There is an OPQ where they ask you about yourself to see that you will fit in with the rest of the students. This is marked by a computer ( you just fill in little boxes)
There is another test I think it is called LSQ and again it is computer marked........whatever you do don't lie on these tests as they can tell, they ask about 250 questions but all are very nearly the same and any inconsistencies will stand out
Good Luck
CYA there ;-) PS Don't forget your ID/Passport