HS2 chief executive Mark Wild told reporters that soaring inflation, especially the spike caused by the Ukraine war, and an unfinished design at the start of construction have driven the high‑speed rail project’s budget toward £100 billion. The line, originally priced at £32.7 billion for the London‑Birmingham leg, now faces a launch window stretching from May 2036 to October 2039.

HS2 budget swells to £100bn amid inflation

According to the report, Wild said the “spikes in inflation, particularly those driven by the war in Ukraine,” are a key factor in the cost explosion.. the figure of £100 billion represents more than a three‑fold increase over the original estimate, underscoring how macro‑economic shocks can cripple large infrastructure programmes.

Design unfinished before 2017 build fuels cost surge

The project began construction in 2017 while the final design was still pending, a decision that “prompted spiking inflation and increased costs,” as the source notes. Building to an incomplete blueprint forced contractors to repeatedly rework sections, inflating labour and material expenses far beyond initial forecasts.

First trains now pencilled in between May 2036 and Oct 2039

HS2’s timetable has slipped dramatically; the first passenger services are now expected sometime between May 2036 and October 2039, rather than the early‑2020s originally promised. this delay also means the trains will operate at a maximum of 199 mph, short of the planned 224 mph, reducing the projected time‑savings for travelers.

Rail minister Lord Hendy warns of taxpayer horror

Rail minister Lord Hendy described the public’s reaction as “horrified,” reflecting growing anger over repeated delays and the ballooning price tag. the minister’s comments highlight the political pressure mounting on the HS2 board to justify the soaring expenditure to a weary electorate.

Who will cover the extra £70bn gap?

The source does not specify how the additional £70 billion will be funded, leaving a critical question unanswered.. Moreover, the report gives no detail on whether the government plans to tap the National Infrastructure Bank or seek private investment to bridge the shortfall.

As Wild,a former London Underground boss, was “parachuted in to ‘reset’ the project,” his confidence that no further delays will occur remains untested, especially given the unresolved financing and the technical compromises already made.