We've got a target of 80% acceptable performance, which was reduced to 70% this quarter, after being at 80% all the time TfL have been running it. You're now speculating that you might reduce that figure further to 65%, I think that's what you've just said to us here. Can you just enlighten us about the way TfL make these decisions? Is it something that happened and that you've found out about in retrospect and you're defending or because safety in TfL is not important enough to be discussed about at board level? Or is it something that you and the TfL Board agreed to as a way of managing declining safety standards?