Check the NATS HR Recruitment (ATCO Careers) website to look up what the latest tests are for stage 1. This should be in a pdf form, under the eligibility/application process tab on the site.
The pratice leaflet, if its the same one I had for last year is now incorrect, or at least its misleading as I believe there is no longer the basic checking test, this has been replaced with a mathematics test which is not mentioned in the practice SHL leaflet although it is mentioned in the aforementioned pdf of 'stage 1 what to expect'.
A word of warning - I think most people find the stage 1 tests are harder and more complex than the practice examples provided, although its still possible to complete them all (I did
) but be prepared!
Good luck