The luck worked, I passed. In fact I got all of the questions right (it was FAR easier than I thought it would be). I really spent far too much time worrying about this test.
You get 45 minutes to answer 24 questions. All multiple choice and really quite simple. From start to finish it took me 4 minutes. This meant that I spent minutes 5-7 stressing that I had missed something out and frantically going over my answers. The invigilator just laughed, gave me my results and sent me on my way.
I guess this means that I'll have to start preparing my application.
Thanks for all the luck - 'tis greatly appreciated.