Slowing Down HS2 Won't Save Any Money

Gareth Dennis
Gareth DennisMar 26, 2026

Why It Matters

Slowing HS2 will likely increase, not reduce, total project costs, jeopardizing the UK's high‑speed rail ambitions and fiscal discipline.

Key Takeaways

  • Slowing HS2 trains will not generate any cost savings.
  • Reduced speed requires more trains and staff, raising operating expenses.
  • Design changes would incur billions in redesign and maintenance costs.
  • Government interference has already inflated HS2’s budget and delays.
  • A design freeze is essential to contain costs and deliver scope.

Summary

The video tackles the UK government’s latest proposal to lower HS2’s operating speed, a move touted as a way to claw back billions. Critics argue the claim is unfounded, noting that the project’s original design already reflects high‑speed standards and that any speed reduction would merely postpone inevitable cost overruns.

Engineers cited in the discussion explain that slower trains demand additional rolling stock, more crew, and expanded maintenance facilities, eroding any perceived savings. Redesigning the track to accommodate lower speeds would trigger billions in extra construction, sidings, and junction work, while also diminishing the network’s capacity benefits.

The presenter highlights a dubious “Mark Wild” review and a Department for Transport spokesperson’s promise to “look at every opportunity” to cut costs, labeling these assurances as speculative. Quotes from industry experts underscore that the only realistic path to fiscal discipline is a design freeze, preserving the scope developed over two decades.

If the government proceeds with speed cuts, HS2’s budget could swell further, delaying delivery and undermining the broader UK rail strategy. A frozen design would lock in costs, allowing the project to move forward without additional political interference, preserving its intended economic and connectivity benefits.

Original Description

Watch Episode 301 of #Railnatter here: https://www.youtube.com/watch?v=YC7qo4TBiHg
Support #Railnatter at https://patreon.com/garethdennis. Merch at https://merch.railnatter.uk. Join in the discussion at https://discord.railnatter.uk. You can also buy my book #HowTheRailwaysWillFixTheFuture: https://bit.ly/HowTheRailways

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