now obviously this can happen a bit, but i don't think, on the whole it happens very much, at least certainly not in a way that matters erm i don't think it does matter if people change things a little bit, because erm  but on the whole people are doing things in the way that they're doing them erm because they've got accustomed to doing them that way and that's the way that they've planned it, and that's the way that it comes out as a result of all of those pressures that there are on them.