Yikes, I'm a bit concerned about these tests now. It also seems a little unfair that you go through with the whole application before doing the test. Mateyface, I hope that they still look at your application. I guess if they're that much more difficult then they'll have a lower pass rate than expected and may take a look at them anyway? It's the first year they're doing this so things may not go exactly according to plan!
Regarding the person specification, I used the one from last year. A quick Google search will turn up all the documents you could ever possibly need.