I'll put the question regarding the consistency and accuracy over to Fiona. She can talk a bit about that.
Obviously it's going to be impossible to get the same person to do the same job at the same standard everywhere across the country. We're at the mercy of individual providers. They're human beings; there are all sorts of variations in there. We set the standards we want and expect, and we monitor to make sure, as best we can, that we get those standards. But I have to say that there will always be variations.