Megaprojects often end up late and hideously over budget. Why?

In between summer holidays and the arrival of a new prime minister, few people will have noticed that, by dithering for a decade, the government has quietly wasted nearly £200mn. Even fewer will have been surprised. But we should be paying attention, not just in the UK, but around the world, because this sort of waste is both ubiquitous and perfectly avoidable...