HS2 Speed Cut Considered to Curb Costs & Fast-Track Project

Ministers are pressing High Speed Two (HS2) to explore running trains at reduced speeds – potentially capping them at 186mph instead of the planned 224mph – as a means of controlling escalating costs and accelerating the project’s delivery. The move signals a significant shift in approach for the controversial high-speed rail line, acknowledging the financial pressures that have plagued the scheme for years.

The Department for Transport, under Transport Secretary Heidi Alexander, confirmed the review, stating that HS2 Ltd. Is assessing the potential savings and earlier completion dates that could result from the speed reduction. The current typical maximum speed for fast trains in the UK is 125mph, while the HS1 line to Kent and the Channel Tunnel operates at the 186mph mark, a common standard across much of Europe. This suggests a potential compromise that would still offer a speed increase over existing lines, while mitigating some of the most expensive aspects of the project.

Cost Pressures and a Revised Assessment

The push for slower speeds comes as HS2 faces mounting scrutiny over its budget. The project’s initial estimates have been repeatedly revised upwards, and the government now anticipates the final cost will exceed £100 billion, particularly after accounting for recent soaring inflation and rising costs for labor and materials like steel. The Guardian reported in March 2026 that HS2 firm has said new steel tariffs will ‘exacerbate’ cost pressures for the UK construction industry. Read more here

Transport Secretary Alexander highlighted the challenges facing the project, noting that a recent review led by HS2 chief executive Mark Wild revealed a significant underestimation of the perform required. “HS2 Ltd did not have an accurate assessment of how much work had been delivered, or of how much was left to do,” she stated in an update to Parliament. Wild, who took the helm in late 2024, is now tasked with delivering a report before the summer recess outlining potential savings from the reduced speed option.

Engineering Realities and Testing Constraints

A key consideration driving the speed review is the current lack of infrastructure in the UK engineered to support speeds exceeding 186mph. According to Alexander, building tracks capable of handling speeds of 224mph or higher would necessitate extensive testing, potentially requiring HS2 to wait for the completion of its own tracks or to send trains abroad for trials – both options adding to costs and delays. This points to a pragmatic assessment of the project’s feasibility, prioritizing a functional railway over achieving the highest possible speeds.

Progress Amidst the Reset

Despite the budgetary concerns and the ongoing review, HS2 is demonstrating progress in certain areas. Alexander praised Wild’s leadership and highlighted the completion of excavation for all 23 miles of deep tunnels required for the opening stage of the railway. More on the tunnel completion here. This suggests that the project is not entirely stalled and that construction milestones are being met, even as the overall plan undergoes a significant reassessment.

Financial Snapshot: Expenditure to Date

As of the latest six-monthly update, total expenditure on HS2 has reached £46.2 billion at current prices. This figure includes £2.6 billion spent on the northern leg of the project, from Birmingham to Manchester, which was cancelled by Prime Minister Rishi Sunak in 2024. The cancellation of the northern leg, intended to connect major northern cities, was a controversial decision that raised questions about the long-term benefits of the remaining phase of the project.

The “Gold-Plating” Critique

Government sources have characterized aspects of the original HS2 design as “gold-plated” and “needlessly overspecced,” suggesting a desire to rein in ambitious features that contribute to the escalating costs. This criticism reflects a broader debate about the value for money of large-scale infrastructure projects and the need to balance ambition with affordability. The focus on reducing speeds aligns with this sentiment, prioritizing a functional and cost-effective railway over a technologically advanced but potentially unsustainable one.

Implications for Passengers and the Network

While a reduction in top speed might seem like a compromise, the impact on journey times may be less significant than anticipated. The majority of the UK rail network operates at 125mph, and even a maximum speed of 186mph on HS2 would represent a substantial improvement for passengers traveling between London and Birmingham. The increased capacity offered by HS2 is expected to alleviate congestion on existing lines, benefiting a wider range of rail users.

HS2 Contracts and the Supply Chain

The ongoing reassessment of HS2’s plans also has implications for the numerous companies involved in the project’s supply chain. In early 2026, contracts worth £6.6 billion were awarded, as reported by The Week, demonstrating the scale of economic activity tied to the project. Any significant changes to the project’s scope or timeline could impact these contracts and the jobs they support.

What Happens Next?

The immediate next step is for Mark Wild to deliver his report on the potential savings from slower trains before the summer recess. This report will be crucial in informing the government’s final decision on the project’s speed and overall budget. Following the report, the government intends to finalize the “reset” plan, including a restated budget in 2026 prices, before publishing it publicly. The coming months will be critical in determining the future direction of HS2 and its long-term impact on the UK’s transport infrastructure.