No, not at all. I think they are very, very clear around establishing roles and responsibilities for each of the players and to be very clear about the expectations that each part of the middle tier can have of each other, as to what they can expect from their partners in the middle tier. And absolutely, it is about making sure that there isn't duplication, that people aren't second-guessing each other's work, and there are clear demarcations about who does what in the system, and, as I said, knowing that you can rely on your colleague in the middle tier to do the bit that they are responsible for. So, I don't think there's a question of it losing focus.
Okay, thank you. We've got a lot of areas to cover so we are going to have to pick up our pace a bit. The next questions are from Siân Gwenllian.
Thinking about you as a Minister trying to see what the long-term trends are with regard to raising standards and improving educational attainment, is that difficult, because the performance measures have changed, haven't they? We can't compare like-for-like now, because of the changes that have been made in the way that performance is measured. So, to begin with, is that a challenge, to see whether progress has been made? And secondly, what evidence do you as Minister use to look at the long-term trends?
The first thing to say, with regard to changes to performance measures—you're right that change to those does make it, in some cases, more difficult to look at trends over a period of time. But those changes are made for really good reasons. If we change a performance measure, it is done to ensure that it is in the best interests of learners. And I think the best interests of learners always trumps the ease of comparison. I understand that, for researchers and for opposition Members, even for Ministers, it would be simpler to have the same set of measures over a period of time. But if we know that those things are driving behaviours that are unhelpful to children, and not in the best interests of children, then we have to change them, even thought that then does create challenges in different areas. With regard to what do we look at, there are a number of ways that we gain data and look at data in the system: everything from the categorisation system we spoke of earlier, and trends in categorisation; we look at Estyn reports; we continue to look at examination results. But we're trying to develop a broader range of data and statistics that give us a whole picture of the education performance, rather than narrowing down on one simple indicator that tells you one thing but doesn't tell you everything. But I don't know, Steve, if there's anything further that you'd like to add.