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    HS2 £46.2bn spent with no new total: delivery risks for project engineers

    March 25, 2026|

    Reviewed by Tom Sullivan

    HS2 £46.2bn spent with no new total: delivery risks for project engineers

    First reported on New Civil Engineer

    30 Second Briefing

    HS2 has already incurred £46.2bn of expenditure as of February 2026, transport secretary Heidi Alexander confirmed in an update on the project’s “reset”, but she declined to provide a revised overall construction cost. The figure covers sunk costs on Phase One civils, land acquisition along the London–Birmingham corridor, and early works for Euston and key viaducts and tunnels, leaving contractors and designers without clarity on remaining budget envelopes. For geotechnical and civil teams, this prolongs uncertainty over future package scopes, phasing and potential value-engineering requirements.

    Technical Brief

    • Programme-level value engineering is expected to focus on scope reduction rather than major re-specification of core alignments.

    Our Take

    In our database of 760 Infrastructure stories, HS2 appears unusually often with both cost‑escalation and construction‑progress pieces, signalling that political scrutiny is rising even as technically complex elements like London tunnelling and Curzon Street foundations move into late phases.

    Recent coverage of specialist methods at Old Oak Common and Curzon Street (e.g. TBM drives and CFA piling) indicates that a large portion of HS2’s committed spend is now locked into deep‑ground and structural works, limiting the scope for major savings without re‑designing surface and systems packages instead.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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