The heart of a contemporary growth policy must, therefore, be to identify these proven scale-ups and put as much as possible behind them – billions more public and private capital, tax incentives, generous orders from government and larger companies alike, maximum access to EU markets, stronger universities and skill formation. This, however, can’t all be done from Whitehall: the international evidence shows that where support is integrated and coordinated locally, whether in Eindhoven, Gothenburg or Boston, the stronger the tech cluster. Britain should follow suit.