Laing O'Rourke Delivery Limited · Physical Exposure and Transition

Concrete + steel are the two heaviest contributors to embodied carbon. Decarbonisation pace of these sectors caps how fast contractors can cut project-level S3.

As a tier-one contractor, Laing O'Rourke's footprint is dominated by purchased concrete and steel embedded in project builds rather than its own operations, with Scope 3 accounting for over 96% of total carbon footprint [E7]. Concrete alone is flagged as a significant driver of Scope 3 Category 1 (purchased goods and materials) emissions, with usage volumes and embodied carbon intensity directly shaping project-level carbon outcomes [E1][E2]. The company's FY23 baseline restatement added Well-to-Tank emissions across multiple Scope 3 categories including materials-related ones, increasing measured exposure to upstream cement and steel supply chains [E5].

Laing O'Rourke became the first UK contractor to mandate low carbon concrete on all new UK projects from April 2023, delivering an estimated 15.5-28% embodied carbon reduction versus FY22 usage depending on reporting methodology [E1][E2][E4]. It extended this approach to Australia in FY24, introducing the country's first maximum tolerance cap on embodied emissions in concrete purchased directly or via subcontractors [E3]. The company has also co-funded an IETF-backed precast concrete decarbonisation research project with Cambridge and Sheffield AMRC [E6], and submitted a near-term 2030 Scope 3 reduction target to SBTi for validation in FY24, having earlier flagged Scope 3 data capture as an unresolved gap [E7][E8].

Aggregates, copper, aluminium, rare earths for finishings. Mining S1+2 caps upstream Scope 3.

Sector-generic framing shown above — company-specific exposure narrative pending.

Operational performance of completed buildings depends on tenant fit-out + grid mix in the country of construction. Contractors have indirect leverage.

Sector-generic framing shown above — company-specific exposure narrative pending.

Excavators, generators, delivery fleet — direct Scope 1 that a contractor can move most quickly. HVO + battery-electric plant availability sets the timeline.

As a major UK and Middle East contractor, Laing O'Rourke's Scope 1 footprint is concentrated in site plant, generators and delivery fleet running on diesel, the direct lever sitting alongside embodied carbon in procured materials. The company's own reporting confirms this is material and trackable: combined UK Scope 1 and 2 emissions fell 15% from the FY23 baseline, with Scope 1 down 12.6% [E1]. Expanded Middle East data now brings that regional plant and fleet footprint into the Group's Scope 1/2/3 figures for the first time [E5].

Laing O'Rourke attributes its 12.6% Scope 1 reduction to fleet electrification and HVO diesel substitution alongside 100% renewable electricity procurement, indicating active plant/fleet decarbonisation programmes already underway [E1]. The Group has also added Well-to-Tank fuel emissions factors to its Scope 3 fuel-and-energy categories, improving the accuracy of fuel-related reporting even as it raises reported totals [E3]. Beyond the disclosed HVO and electrification actions, there is no further operational detail in the extracted reports on specific plant electrification timelines or zero-emission site standards.

Long tail of subcontractors + material suppliers carries most of the project embodied Scope 3. Credibility of tier-1 vendor targets determines pass-through.

As a UK contractor, Laing O'Rourke's largest emissions exposure sits in Scope 3 purchased goods, particularly concrete, steel, glass and aggregate procured from a long tail of material suppliers and subcontractors [E7]. Concrete alone is flagged as a significant driver of Scope 3 emissions, meaning supplier specifications and mix design choices materially affect project-level embodied carbon [E7][E8]. The company has also begun assessing nature-related impacts and dependencies of key procured commodities including steel and biodiesel, extending supply chain risk beyond carbon alone [E5].

Laing O'Rourke scores in the CDP Supplier Engagement Rating 'Leadership' band at A-, well above the construction sector and global average of C [E1], and has separately improved its own CDP Climate Change score to B [E3][E2]. Its most concrete supply-chain lever is a mandate, effective April 2023, requiring low carbon concrete on all new UK projects, which delivered a 15.5% (6,719 tCO2e) reduction against FY22 usage and helped contain growth in Scope 3 Category 1 emissions [E7][E8]. The company has strengthened data credibility behind these claims through first-time limited assurance of Scope 1, 2 and 3 GHG data and prior third-party verification of sustainability KPIs, and is developing a fuller biodiversity strategy in FY24 following preliminary supply chain nature assessments [E6][E4][E5].