I agree—that was the conclusion of the independent economic review. The Government should build HS2 and HS3 as one system. Why build one, go away and do the north another time? Why not build them together as a single high-speed railway and high-quality infrastructure project that will deliver those economic benefits? I say to the Government that we cannot have a northern powerhouse without that kind of investment—it is essential to delivering the economic benefits my hon. Friend described.