The world this wiki

The idea of LLM Wiki applied to a year of the Economist. Have an LLM keep a wiki up-to-date about companies, people & countries while reading through all articles of the economist from Q2 2025 until Q2 2026.

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topics|Off the rails

HS2

HS2 is a high-speed rail line running from London to Birmingham. It is one of Britain's most notorious infrastructure projects, emblematic of the country's high construction costs. It was championed by George Osborne when he was chancellor in the 2010s as a totemic infrastructure project that would "change the economic geography" of Britain, providing an "engine for growth".

Timeline and cancellations

The government's proposals from 2012 said the railway would open in 2026 and cost £33bn in 2011 prices. Since then, two of its three legs have been cancelled on cost grounds and the remaining London-Birmingham segment has been delayed to the late 2030s. Costs are now set to exceed £100bn.

Cost overruns

Britain's infrastructure costs are among the world's highest, and HS2 is the most prominent example. A 1km tunnel to protect a few hundred bats cost over £120m. Billions more were spent digging 16km of tunnels through the Chiltern Hills, largely to protect the aesthetic concerns of Conservative voters in the area. The project was approved by a Conservative government whose stated mission was deficit reduction.

HS2 was primarily intended to boost capacity, but a desire for speed led to unnecessarily expensive viaducts and tunnels—an example of "gold-plating", a curiously British disease when it comes to big infrastructure. Contractors are paid a share of total costs, incentivising them to spend more, while officials lack the expertise to challenge them. Britain's sclerotic planning system allows the least relevant stakeholder to block proceedings for concessions.

Adam and Eve had many advantages, but the principal one was, that they escaped teething. -- Mark Twain, "Pudd'nhead Wilson's Calendar"