PAS 2080 Carbon Management Support for a Major Rail Electrification Programme

A principal contractor delivering overhead line equipment (OLE), route clearance and associated track interventions across a 136 km rail corridor required robust, auditable progress against carbon and sustainability requirements, including Network Rail’s NR/L2/ENV/015 and NR/GN/ESD07, alongside alignment with PAS 2080 and BREEAM Infrastructure.

Arthian was appointed in April 2025 as part of the integrated delivery team to strengthen carbon management, align governance with PAS 2080, and turn complex carbon data into actionable insights. The programme supported ambitious whole life carbon reduction objectives and contributed towards a target of achieving BREEAM Infrastructure 75% (‘Excellent’).

The programme spanned eight route sections and involved more than 70 multidisciplinary interventions. Carbon impacts were dominated by steel‑intensive OLE structures and foundations, alongside route clearance and track‑lowering works. The client’s objectives included demonstrating a minimum 25% whole life carbon reduction and clear alignment with PAS 2080 across strategy, design and construction stages.

At mobilisation, multiple carbon datasets, reports and assumptions existed across the supply chain but required consolidation and refinement to enable effective interrogation. Several route sections were already at advanced design stages, limiting the opportunity to influence specifications. Carbon management therefore needed to focus on the most material emissions hotspots, while maintaining a clear and auditable evidence trail to support client assurance, governance and future audit requirements.

Delivery was undertaken within established engineering standards for OLE and track interventions, and required coordination across designers, contractors and specialists as lower carbon approaches were evaluated. Carbon reporting also needed to align with both client and Department for Transport expectations, including robust baselines, documented assumptions and effective change control.

The improved governance and usability of carbon information laid the groundwork for the delivery team to make faster, better‑evidenced decisions that supported adoption of lower carbon specifications and approaches. Updated WLC assessments at the Construction-Ready Design stage demonstrated a further 10–14% carbon reduction across two route sections, building on earlier savings. Arthian’s PAS 2080 support also contributed to the contractor achieving PAS 2080 certification.

This project demonstrates how proportionate, PAS 2080‑aligned carbon management can operate as a practical delivery tool. By focusing on key hotspots, strengthening assurance and creating a clear audit trail, Arthian helped reduce delivery risk, protect commercial outcomes and provide confidence in carbon performance across a complex rail infrastructure programme.