HS2 Tunnelling: The Client’s Perspective

On 16 October 2025, two speakers from the client team at High Speed Two Ltd (HS2) presented on tunnelling progress to a packed joint meeting of the British Tunnelling Society (BTS) and British Geotechnical Association (BGA). Martyn Noak, Head of Ground Engineering, provided a project overview and progress update on HS2 project Phase 1, including TBM data; Mark Lemmon, Lead Tunnel Engineer, described the geological setting and associated challenges. Here, they present the key points of their presentation.