Three UK sustainability score: 41/100

Three UK does not publish standalone Scope 1 & 2 emissions. Parent CKHGT reports group-level data (Scope 1: ~16,394t, Scope 2: ~296,032t, 2023), but Three UK's estimated operational footprint of 30,000–80,000 tonnes across thousands of base stations and retail stores remains undisclosed at entity level.

CKHGT reports group Scope 3 of 1,295,362 tCO2e (2023) and holds CDP Supplier Engagement 'A' rating. Three UK does not publish entity-level Scope 3 data, so specific UK supply chain footprint for handsets, network equipment, and logistics is not disclosed.

CKHGT achieved ~20% reduction from 2020 baseline with ~5% year-on-year reduction in 2023; on track for SBTi targets. Three UK notes Ericsson partnership delivering 70% efficiency gains at selected sites. No Three UK-specific absolute trajectory published; revenue and customer base grew 3% in 2023.

Three UK commits to 'at least 97% renewable electricity for directly procured electricity.' For buildings and network sites where Three does not select suppliers directly—stores, some network infrastructure—it is liaising with stakeholders on renewable usage. No detail on unbundled RECs or verified green tariff basis.

No biodiversity policy, TNFD disclosure, or deforestation commitment found. Three UK's environment page focuses exclusively on carbon and energy. No evidence of nature risk assessment or ecosystem impact mitigation despite network infrastructure footprint through mast sites and cabling.

Three UK acknowledges e-waste is fastest-growing UK waste type and references repair and recycling initiatives. Supply chain team working to reduce single-use plastics and improve packaging. CKHGT promotes product take-back schemes. No quantified waste metrics, circular economy targets, or waste reporting published.

No water consumption data, footprint assessment, or management policy found. Telecoms has relatively low water intensity compared to manufacturing or agriculture, but no evidence of monitoring or awareness disclosed.

CKHGT's SBTi-validated 1.5°C-aligned targets: 50% Scope 1 & 2 reduction and 42% Scope 3 reduction by 2030 (2020 baseline). Group on track; no offset reliance. Three UK states it is 'developing detailed emissions reduction strategy for 2030'—entity-level roadmap not finalised.

Three UK publishes environment page only; no standalone sustainability report. All emissions and detailed disclosures at CKHGT group level. CKHGT scores A- in CDP (2025), A in Supplier Engagement. Three UK as entity lacks dedicated sustainability reporting, role disclosure, and impact report despite £2.59bn revenue and 10.6m customers.

No greenwashing allegations, regulatory fines, ASA rulings, or environmental controversies identified. No climate-misaligned lobbying or anti-climate trade association membership found. Vodafone-Three merger faced competition scrutiny on market concentration, not environmental grounds.