The Treasury faces the unenviable task of plugging a shortfall of up to £33bn after ministers conceded that the latest reset of HS2 has driven the embattled rail project’s bill towards a staggering £102bn, leaving the chancellor with little choice but to raid other budgets, raise taxes, or both.
Analysis of the Department for Transport’s revised plans for the London-to-Birmingham line, published in the wake of transport secretary Heidi Alexander’s bruising statement to the Commons on Tuesday, suggests Whitehall will need to find between £18bn and £33bn of additional public money before the end of the current spending review period. For Britain’s beleaguered small and medium-sized businesses, many of whom were promised that HS2 would unlock regional growth and faster supply chains, it is yet another reminder that the country’s record on delivering major infrastructure remains, to put it mildly, patchy.
Alexander did not mince her words at the despatch box. She branded the line, originally intended to whisk passengers between London Euston and central Birmingham in under 50 minutes, an “over-specced folly” and accused her Conservative predecessors of needlessly gold-plating a scheme that has already swallowed £44bn of taxpayers’ cash over its 17-year existence. According to the official update delivered to Parliament, the first trains will not now run before 2036 at the earliest, with services into central London delayed until at least 2040, meaning construction will have stretched across more than a quarter of a century by the time the project is complete.
It is the sixth major reset HS2 has endured in just 13 years. The latest came after the so-called Stewart Review, commissioned by Labour shortly after it entered government in 2024, lifted the lid on what its author described as a “litany of failures” inside the Department for Transport and arms-length body HS2 Ltd, where management had been allowed to “spiral out of control”. The Institution of Civil Engineers’ assessment of the Stewart Review painted a damning picture of weak governance, optimism bias and a procurement strategy that left contractors holding too few of the risks, the sort of failings that any seasoned SME owner would recognise as fatal in their own business.
The numbers tell their own grim story. Officials now expect the line to cost as much as £36bn more than the previous official estimate, on top of the £25bn of additional taxpayer cash already earmarked at last year’s spending review. That leaves between £18bn and £33bn of unfunded spending sitting awkwardly on the Treasury’s books, money which will either have to come from fresh tax-and-spend measures, from cuts to other cash-strapped departments, or, most likely, from a combination of both. Sources familiar with the matter tell Business Matters that ministers have ruled out additional borrowing on the scale needed to plug the gap, fearful of breaching the government’s self-imposed fiscal rules.
For now, Whitehall insists the Treasury’s current envelope, which covers all public spending up to 2029-30, absorbs every penny HS2 requires this decade. The pain will instead be felt at the next spending review, when chancellor Rachel Reeves – or her successor – will have to decide which other priorities give way. Whether that means leaner settlements for schools, hospitals and policing, or whether the burden falls on business and household taxes, will be the defining fiscal battle of the late 2020s. Ms Reeves had previously hoped to anchor her growth strategy on a £92bn transport investment programme, much of which is now at risk of being crowded out by HS2’s voracious appetite for capital.
It also raises uncomfortable questions about the credibility of the cost figures that have been presented to Parliament over the past decade. The same Whitehall machinery that signed off on earlier estimates is now telling business leaders to take the new £102bn projection on trust, even as transport experts begin to whisper that the eventual bill could climb higher still. Business Matters recently reported that ministers had been actively considering slowing HS2 trains in a bid to claw back billions, a move that critics argue undermines the original rationale for the project in the first place.
The political backdrop is no less awkward. The line was originally conceived as a Y-shaped network connecting London to both Manchester and Leeds via Birmingham. Boris Johnson axed the eastern leg to Leeds in 2021; his successor Rishi Sunak then scrapped the Manchester arm two years later. Each cut was sold as a saving, yet the bill has continued to climb. As one senior figure with experience of past resets put it earlier this year, Conservative ministers had wasted billions on a project that was never properly gripped – a charge the party’s frontbench is now finding difficult to rebut.
For Britain’s SMEs, the implications are stark. Construction supply chains in the Midlands and along the line of route have ridden the rollercoaster of stop-start commitments for the best part of two decades. Manufacturers, engineering consultancies and specialist tier-two contractors had built order books on the assumption that phase two would, at the very least, run as far as Crewe. Many of those orders have evaporated. Meanwhile the broader business community is being asked to believe that the same Treasury now juggling a £33bn shortfall on a single project can still be trusted to underwrite the long-promised renaissance of regional infrastructure.
The lesson, painful as it is, is one that any owner-managed business learns in its first decade: budget overruns of this scale do not just happen. They are baked in at the start by woolly objectives, scope creep, weak commercial discipline and political interference. HS2 has had all four in industrial quantities. Until Westminster develops the institutional muscle to deliver megaprojects on time and on budget, British business will continue to pay the price, both directly, through taxes and forgone investment, and indirectly, through a global reputation for infrastructure delivery that is fast becoming a cautionary tale.
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HS2 reset to punch £33bn black hole in Britain’s public finances