HS2 Cost Reset Tops £100 Billion as Trains Slow Down

BBC Business reported Tuesday that the UK’s troubled high-speed rail project could cost as much as £102.7 billion. The HS2 cost reset marks a dramatic reckoning for the most expensive infrastructure programme in British history.

Transport Secretary Heidi Alexander told the House of Commons that total costs now fall between £87.7 billion and £102.7 billion in 2025 prices. That figure is roughly double the cost range set by the previous Conservative government when adjusted to 2019 prices.

A Project Running Out of Road

Services between Old Oak Common in west London and Birmingham Curzon Street will not begin until 2036 at the earliest. The outer bound stretches to 2039, pushing the timeline up to six years beyond the most recent official target of 2033.

The full route connecting London Euston and Birmingham, including a link to the West Coast Main Line, is not expected before 2040 to 2043. Alexander described inheriting a “litany of failure” from her predecessors, declaring the project had become a symbol of national decline rather than national ambition.

Alexander confirmed that abandoning the line entirely would cost almost as much as completing it, while delivering none of the promised capacity and connectivity benefits. That calculation underpins the government’s decision to press forward despite the ballooning price tag.

Background: A Decade of Scaled-Back Ambitions

HS2 was originally designed to connect London with Manchester and Leeds at speeds of up to 360 kilometres per hour. Under successive Conservative governments, both northern legs were cancelled, reducing the route to a London to Birmingham corridor.

The government now plans to reduce the maximum operating speed further, to 320 kilometres per hour, aligning it with high-speed services common across Europe and Japan. Officials say the slower speed could save up to £2.5 billion and shave around a year off the delivery schedule.

As of March 2026, £44.2 billion has already been spent on the programme. The government attributes two-thirds of the cost increase to underestimated budgets, inefficient delivery and works omitted from earlier plans. Inflation accounts for the remaining third.

Targets Set, Accountability Demanded

HS2 Ltd chief executive Mark Wild has been given a target of delivering the project by 2037 at a cost of £92.2 billion. Alexander said the government backs that goal, providing Wild with a clear mandate to drive productivity and contain costs.

Shadow transport minister Jerome Mayhew acknowledged early mismanagement but called on both Alexander and HS2 Ltd to publish detailed delivery plans. He argued that genuine reform requires legislative changes to prevent future cost overruns from occurring without consequence.

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