The hon. Lady is making an excellent speech, and I congratulate her on securing this debate. Her point about through-life costs is very powerful. Does she agree that there should be more scrutiny—possibly independent—of the increase to the overall cost of projects caused by changes early in the cycle? I am, of course, thinking of the decision to delay the vote on renewing the deterrent submarines, which has added a significant amount of risk and cost to the project. Many of us said that to the Government at the time, but there was no ability to assess independently what the increased costs would be.