I was also there yesterday and also, unfortunately, didn't go through to the afternoon interviews. What N9231C said is pretty accurate -- save that the tech test seemed quite a bit broader in scope than conventional 'simple' ATPL technical theory.
For those of you still to go, it's a good chance to get to know what seems to be a good employer and a really friendly bunch to work with. There certainly appeared to be no tricks or surprises. I would wager there's little in the morning session that can realistically be 'prepared' for in advance (save the technical knowlege factor).
Last edited by Sheep Worrier; 1st Oct 2015 at 16:48.