The Secretary of State makes a point about the evolution of technology over the past century. It is amazing to think that it was only 10 years from the first flight of the Lancaster bomber to the first flight of the Vulcan. The level of evolution in that period is astonishing in today’s terms. In addition, the cost of these technologies has increased exponentially over the past century. His Department normally calculates defence inflation. How can he properly assess the true cost of these equipment programmes? Can he commit to reinstating defence inflation, so that we can properly plan to give our wonderful aircraft industry the certainty that it needs for the future?