I have to make some progress. I regret not being able to give way, because the hon. Gentleman made some good points.

I wish to make it clear that it was proper of the permanent Secretary, as accounting officer for the Department, to draw attention to the fact that Ministers had not chosen the option that appeared to deliver best value for money. However, it is equally proper of the Secretary of State to set out his reasons for taking the decision. In other words, all those involved behaved properly and there is no question of official advice being biased in any way.

I also want to dispel the myth that the correspondence between the Secretary of State and the accounting officer was somehow leaked; it was not. In accordance with the relevant civil service rules, those letters were, in fact, shared openly on the day Ministers made their announcement with the head of the National Audit Office and, subsequently, with members of the Public Accounts Committee.