Why has HS2 ended up being so expensive?

The project is shrouded in uncertainty and other countries’ railway constructions appear to be cheaper

• Sunak may seek to limit HS2 fallout with new transport projects in north

The future of Britain’s high-speed railway project is again shrouded in uncertainty, with Downing Street apparently considering axing the route north of Birmingham to Manchester amid concern over escalating costs. So why exactly is HS2 so expensive?

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