All the tests are multiple choice, just completed from a test book on paper.
Four sets of test, first one is a maths test, quite challenging make sure you are up to speed on algebra, fraction addition and multiplication.
Second test is the patterns and sequence type questions, you'll be given an array of patterns, shapes, lines and you will need select the item which comes next in the sequence.
The third test is spatial reasoning, each question consists of a cube with patterns on, then you will be shown four cubes unfolded in a 2D view, you will need to select the 2D view which folds into the 3D view.
Then the next test is a mechanical reasoning, this consists of number of diagrams showing various mechanisms, sort of question is if you pull this lever to the left which way does part b move type thing.
All test are timed, near impossible to finish the questions in the time.
There is also a personality questionaire with a few verbal reasoning questions.
The interview, I found to be very informal, more of a chat about your background. I had read on previous posts there would be technical questions but I didn't get any technical questions at the interview.