That's the one I was talking about. That initial photoshoot is a level 2 photoshoot, and both the others ( the sportswear and bikini shoots were level 1's). Andrew initially says that swimwear is a level 2 shoot, but since the bikini shoot used exactly the same qualifying criteria as the sportswear shoot, that seems to contradict that, and it looks like some swimwear shoots can be level 1 as well. He suggests the first photoshoot was a more advanced photoshoot than a typical level 2, so perhaps there's a level 2 + category as well. Level 3 are very skimpy outfits involving semi nudity through to full nudity, whilst level 4 is the same, but involving more erotica( simulated sex acts with other male or female models). The higher levels are not determined just by what the model is expected to wear, but what she's expected to do. So level 1 shoots are much less erotic, and each level higher requires Emma to be sexier and less inhibited.
As I said she only got the level 2 shoot, because the model booked to do that, cancelled at the last minute. And Emma was already there. But even though she does a decent job, she still isn't at a high enough standard to satisfy Andrew, so he insists that she gets fitter and takes pole dance lessons before he'll book her again ( for the level 1 shoots). If she wants to do more shoots like the first one, she first has to prove she can do the level 1 shoots to the standard he expects.