I thank my noble friend the Minister for his Answer. Of course, I understand that the mechanism of this programme has to move ahead, not least for diplomatic and political reasons, but would he assure me that, in the context of the strategic defence review, nothing is off the table, apart from the fact that we maintain a nuclear deterrent? That was what was said, effectively—so everything will be looked at. There must be serious concerns about the operational requirement for this system, which is not clearly articulated. How many platforms will be required, finally, and how many aircraft? That is not articulated. The costs are pretty open, I have to say, and it really does need to be looked at.