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Rank #9 · Aggregates & Marine Dredging

Brett Aggregates

Evidence basis: Asset-level disclosureMarine relevance: Direct (marine aggregates)
Moderate
59.2
Final / 100
Future Commitments
11.8
/ 25
47%
Significant gaps
Environmental Action
31.2
/ 52
60%
Mixed performance
Governance & Accountability
14.4
/ 20
72%
Solid performance

Why this score?

  • Score is supported by: Operational emissions intensity (score 4/5)
  • Additional strength: Environmental compliance, permits and incidents (score 4/5)
  • Score is constrained by: Net-zero / climate transition target (score 2/5)
  • Evidence basis: Asset-level disclosure.
  • Performance is interpreted through marine-specific evidence (vessel emissions, dredging, sediment, marine permitting).

Key strengths

  • Operational emissions intensity (score 4/5)
  • Environmental compliance, permits and incidents (score 4/5)
  • Interim emissions reduction target (score 3/5)

Main gaps

  • Net-zero / climate transition target (score 2/5)
  • Scope coverage and value-chain emissions (score 2/5)
  • Habitat disturbance and seabed / land-use impact (score 2/5)
Sector-relevant substitute applied: Tailings / mineral residue / waste rock management

Evidence behind the score

Raw evidence summary, scoring rationale and weighted contribution for each of the 15 metrics, written from reviewed public sustainability materials.

Future Commitments
Raw evidence summary

Brett Aggregates does not disclose a standalone corporate net-zero target such as “Brett Aggregates net zero by X year.” The 2024 report states that Brett remains committed to improvement in line with the UK Government Net Zero target by 2050, but this should be treated as alignment with national net-zero policy, not a separate company-specific net-zero target.

Scoring rationale

Aligned to UK national net-zero 2050; no standalone corporate target.

Raw evidence summary

Brett Aggregates sets short-term operational targets from its 2021 baseline, including reducing production energy intensity and production kgCO₂e/tonne by 1% per year to 2025. The same 1% annual reduction logic is also applied to transport-related kgCO₂e/tonne and water-use intensity metrics.

Scoring rationale

1% annual reduction in production CO2e/t and energy intensity from 2021.

Raw evidence summary

The report incorporates GHG reporting under ISO 14064-1 and defines the reporting boundary as production of aggregate. It discloses emissions sources including electricity, gas oil for mobile plant, gas oil for dredger and transport-related emissions, and states that no GHG sources were excluded within the established boundary. However, it does not provide a full corporate Scope 1 / 2 / 3 inventory in the same format as larger listed companies.

Scoring rationale

GHG under ISO 14064-1; aggregate boundary; full Scope 1/2/3 not corporate-style.

Environmental Action
Raw evidence summary

Brett Aggregates’ responsible extraction evidence is based on certified management systems and responsible sourcing: ISO 9001, ISO 14001, ISO 45001 and BRE BES 6001. The company states that it balances supplying materials with respecting and conserving the land it works and restores. Brett’s marine aggregates page adds that Britannia Aggregates and Volker Dredging extract aggregates from the seabed, and that marine operations are subject to controls regulating effects on shorelines, fishing and marine life.

Scoring rationale

ISO 9001/14001/45001, BES 6001; marine extraction permit-controlled.

Raw evidence summary

Production emissions intensity improved from 1.72 kgCO₂e/tonne in 2021 to 1.299 kgCO₂e/tonne in 2024. The report also states that the figure would be 1.09 kgCO₂e/tonne based on the current 100% renewable electricity supply. Production energy intensity improved materially from 6.92 kWh/tonne in 2021 to 1.009 kWh/tonne in 2024.

Scoring rationale

1.299 kgCO2e/t in 2024 (1.09 with renewables) vs 1.72 in 2021.

Raw evidence summary

Brett Aggregates does not disclose one consolidated absolute emissions total. The strongest evidence is intensity-based: production emissions intensity fell from 1.72 to 1.299 kgCO₂e/tonne between 2021 and 2024, and energy intensity fell from 6.92 to 1.009 kWh/tonne. However, transport emissions intensity worsened from 1.19 kgCO₂e/tonne in 2021 to 2.72 kgCO₂e/tonne in 2024, so the emissions picture is mixed.

Scoring rationale

Production intensity improving; transport intensity worsening.

Raw evidence summary

Brett reports water intensity rather than total withdrawal / consumption / discharge volumes. In 2024, mains water use was 20.86 litres/tonne, compared with 20.54 litres/tonne in 2021. Controlled groundwater use was 368.20 litres/tonne, compared with 314.36 litres/tonne in 2021. The target is to reach an optimum level of water use while targeting 1% annual reduction from baseline levels by 2025.

Scoring rationale

Mains 20.86 l/t & groundwater 368 l/t; intensity rather than volumes.

Raw evidence summary

The report does not provide a detailed effluent-quality table, but it reports zero convictions for air and water emissions in 2024, unchanged from the 2021 baseline. It also reports 100% production-site coverage by UKAS-certified ISO 14001 EMS, which supports environmental control. For marine extraction, Brett’s website states that dredging operations are regulated through controls addressing shorelines, fishing and marine life, although it does not disclose Brett-specific water-quality monitoring results.

Scoring rationale

Zero air/water convictions; 100% UKAS ISO 14001; no detailed effluent table.

Raw evidence summary

Brett provides qualitative biodiversity evidence but limited sensitive-area quantification. The report states that 100% of relevant production sites have site-specific action plans. Brett’s sustainability page says quarries are restored as work progresses, with the aim of providing environmental benefits and promoting biodiversity. However, no number of sites near protected or high-biodiversity areas is disclosed in the report or Brett website.

Scoring rationale

100% sites with action plans; sensitive-area site count not quantified.

Raw evidence summary

Brett is directly relevant to marine / extractive benchmarking because its aggregates business includes quarry and marine-dredged aggregates. Brett states that it is the largest independent producer of sand and gravel in the UK, with quarry, marine-dredged aggregates and coated roadstone operations serving London, the East and South East of England. Brett’s marine page also confirms seabed extraction through Britannia Aggregates and Volker Dredging, while BMAPA lists Brett Group, Britannia Aggregates and Volker Dredging among UK marine aggregate producers. However, no Brett-specific dredged area, licensed seabed area or seabed-disturbance figure was identified.

Scoring rationale

Marine dredging operations confirmed; no Brett-specific seabed area.

Raw evidence summary

Brett’s website states that quarries are restored to high standards as work progresses and that the company aims to promote biodiversity through responsible land management. The report also states that 100% of relevant production sites have site-specific action plans. However, Brett does not disclose hectares restored, post-extraction land-use area, restoration liabilities or site-by-site closure figures in the reviewed materials.

Scoring rationale

Restoration as work progresses; hectares & liabilities not disclosed.

Raw evidence summary

Mining-style tailings / TSF / GISTM evidence is not applicable to Brett Aggregates because it is an aggregates and marine dredging business rather than a tailings-intensive mining company. The closest equivalent is quarry waste, processing residues and secondary aggregate use. The report therefore supports this metric through waste-to-landfill and recycled / secondary aggregate indicators, rather than tailings data.

Scoring rationale

Tailings not applicable; waste-to-landfill 0.0009 kg/t (excellent).

Raw evidence summary

Brett reports very strong waste-to-landfill performance but weaker recycled / secondary aggregate share versus its own target. Waste to landfill improved from 0.017 kg/tonne in 2021 to 0.0009 kg/tonne in 2024, well below the target of <0.050 kg/tonne. However, recycled / secondary aggregate fell from 23.81% of total aggregate production in 2021 to 9.28% in 2024, below the target to maintain >20%, subject to availability and client demand.

Scoring rationale

Waste-to-landfill excellent; recycled aggregate share fell from 23.8% to 9.3%.

Governance & Accountability
Raw evidence summary

Brett reports zero convictions for air and water emissions in 2024 and 2021. It also reports 100% of production sites covered by UKAS-certified ISO 14001 EMS, 100% UKAS-certified ISO 9001, and 100% reported production certified to BES 6001. Community complaints fell from 15 actual complaints in 2021 to 3 actual complaints in 2024. External marine-sector evidence also confirms that UK marine aggregate extraction is carried out under a licensing / monitoring framework, but Brett-specific permit breaches were not identified.

Scoring rationale

Zero air/water convictions 2024; 100% ISO 14001; complaints 15→3.

Raw evidence summary

Brett’s supplier / contractor evidence is mainly standards-based rather than audit-count based. The report states that the company works with supply-chain partners to develop suitable management systems, certified standards and directives. It also reports 100% reported production certified to BRE BES 6001 and GHG verification by Excellentia69 Consultancy Limited to AA1000 moderate assurance, equivalent to limited assurance under ISO 14064-3. Brett’s policies / certifications page also confirms ISO 14001, ISO 45001 and BES 6001 coverage.

Scoring rationale

BES 6001; AA1000 GHG verification; supplier audit count not disclosed.