The hon. Lady is making a very effective case for multi-year spending and the need to reappraise entirely the Green Book principles. Does she agree that, in this instance, the restrictions on multi-year spending for programmes—particularly the Type 26—put at risk our sovereign capabilities, such as the electric motors factory in Rugby, which manufactures critical components for anti-submarine frigates? That may have been lost had the MOD not responded. We cannot continue to fight a war of attrition; we need a strategic approach.