aewaite17,
I've just had so much fun playing some games on the NATS careers website
They are new to me - I've never come across them before, so wonder if they are new to everyone?!
The games relate to some of the computer tests you'll have to do at your stage 2 - so it's well worth having a look.
NATS Games
Also, read through this thread - quite a few people give their experience of the computer tests.