NATS interview process

[C4M19]

Stage 2

Hi, Im booked in for the 7th March stage 2 assessment center. I've read through the documents they give you for the preparation everyday since i was sent the email and am pretty confident on the majority of the document. I was just wondering if anyone would be able to give me some tips and to tell me what it consists of and what each test entails. Here are some of my questions.

Is the paper based test multiple choice or written based and what does it consist off, is it just to do with the document they send you or is there other stuff you need to know?
What does the FEAST computer test consist off and how hard is the test and is there anyway to prepare for it?
What does the DART computer test consist off and how hard is the test and is there anyway to prepare for it?

Also has anyone used the "SkyTest Preparation Software for NATS ATCO Screening" to prepare for this and how similar it is to the test and whether or not it is worth buying to prepare.

Any information will me much appreciated

Thanks