ScottishPower is a major UK electricity supplier and network operator owned by Spanish utility Iberdrola.
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ScottishPower has structurally exited fossil fuel generation and now sources 100% renewable electricity, with parent Iberdrola holding SBTi-validated net-zero targets. However, the company consolidates emissions reporting into Iberdrola's group figures, obscuring UK-specific transparency. Biodiversity targets are forward-looking, waste circularity unverified, and subsidiary-level data gaps limit independent scrutiny.
ScottishPower scores 51/100 (Making progress) on SINK's independent climate assessment, scored from public data only. Fees pay for the review, never the result. Last verified May 2026.
That places ScottishPower joint 126th of 847 companies scored, and 1st of 20 in Energy Supply / Utilities.
ScottishPower is the highest-scoring energy supply / utilities company we've rated.
Among the 20 major energy supply / utilities brands we've scored, ScottishPower sits 1st of 20.
Its three lowest-scoring questions, and what the evidence didn't show.
ScottishPower-specific water consumption not published separately.
No standalone waste data or circularity metrics published at subsidiary level.
Methodology GHG Protocol-aligned and third-party verified at group level, but UK subsidiary granularity not separately published.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →Strongest on Energy Source and Targets & Commitments (9/10, 8/10). Weakest on Water Impact and Resource Use & Waste (4/10, 5/10).
ScottishPower leads its sector. These are the next 3 down.
VERBUND is 96% renewable-powered but emissions rose 4% in 2024 as gas generation recovered.
See the breakdown →Ecotricity supplies 100% green electricity but 99% fossil gas, masking its true emissions footprint.
See the breakdown →SSE publishes comprehensive GHG data with external assurance and holds SBTi-validated targets, but absolute emissions rose 10% in FY2024/25 due to increased thermal generation.
See the breakdown →The formula and all 12 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale12 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
If you believe a source has been misread or a newer version exists, submit a challenge.
ScottishPower is a major UK electricity supplier and network operator owned by Spanish utility Iberdrola. Founded in 1990 and headquartered in Glasgow, it operates generation assets (predominantly offshore and onshore wind), distribution networks across central and southern Scotland, and retail energy services for 3+ million customers.
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