RemAir,
They didnt ask my anything about previous aircraft flown, however they did ask other candidates that day, so be prepared is all I can say.
Yeah some questions were direct and only needed a couple of words as an answer, others however, such as "Why do you want to be a Pilot"? require more than just a few words. Enthuse in your answers and maintain eye contact with both assessors, also smile and be polite, which im sure you're already aware of
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I was there a total of about 5 hours, from 08:30 until 13:30. Others were there longer, others were there for less time. Just depends how it works out on the day.
GD