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Price is only part of the story. Let’s look at customer service, billing and the published evidence together, so you know what to ask before choosing.
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Current Supplier Watch
H1 2026Top Rated Supplier
Octopus Energy
Overall score 92/100
No score movement
No supplier moved up in the latest monitoring cycle. Awarded once a supplier posts a positive score change between cycles.
Supplier Under Watch
ScottishPower
Status: Watchlist
Best Value Tariff Provider
Octopus Energy
Tariff score 100/100
Best Customer Service
Octopus Energy
Service score 94/100
Biggest Complaints Reduction
Octopus Energy
Complaint score 86/100
Supplier Dashboard
Live performance snapshot for every monitored UK energy supplier, refreshed automatically every week.
Octopus Energy
Updated 12 Oct 2026 · data to 30 Jun 2026
So Energy
Updated 12 Oct 2026 · data to 30 Jun 2026
EDF Energy
Updated 12 Oct 2026 · data to 30 Jun 2026
OVO Energy
Updated 12 Oct 2026 · data to 30 Jun 2026
Utility Warehouse
Updated 12 Oct 2026 · data to 30 Jun 2026
E.ON Next
Updated 12 Oct 2026 · data to 30 Jun 2026
British Gas
Updated 12 Oct 2026 · data to 30 Jun 2026
Co-op Energy
Updated 12 Oct 2026 · data to 30 Jun 2026
ScottishPower
Updated 12 Oct 2026 · data to 30 Jun 2026
UK Energy Supplier Performance Report 2026
Our flagship independent ranking of UK energy suppliers, covering customer service, tariff competitiveness, complaint performance and consumer risk.
Supplier Watchlist
Significant Improvement
No suppliers flagged.
Significant Decline
No suppliers flagged.
Service Concerns
- British Gas
Customer service score sitting at 52/100.
- Co-op Energy
Customer service score sitting at 50/100.
- ScottishPower
Customer service score sitting at 45/100.
Complaint Concerns
- British Gas
Complaint risk indicator at 49/100.
- Co-op Energy
Complaint risk indicator at 48/100.
- ScottishPower
Complaint risk indicator at 41/100.
Tariff Changes
- Utility Warehouse
Tariff competitiveness slipping at 53/100.
- British Gas
Tariff competitiveness slipping at 54/100.
- Co-op Energy
Tariff competitiveness slipping at 49/100.
Supplier League Table
| # | Supplier | Overall | Status | Move | |
|---|---|---|---|---|---|
| 1 | Octopus Energy | 92 | Stable | View | |
| 2 | So Energy | 78 | Stable | View | |
| 3 | EDF Energy | 73 | Stable | View | |
| 4 | OVO Energy | 62 | Stable | View | |
| 5 | Utility Warehouse | 61 | Stable | View | |
| 6 | E.ON Next | 60 | Stable | View | |
| 7 | British Gas | 55 | Watchlist | View | |
| 8 | Co-op Energy | 51 | Watchlist | View | |
| 9 | ScottishPower | 50 | Watchlist | View |
Scoring Methodology
The PowerGuardian Score is an independent 0–100 rating built from six weighted consumer-impact dimensions.
Complaint Performance
25%Tariff Competitiveness
20%Customer Service
20%Direct Debit Fairness
15%Consumer Transparency
10%Market Stability
10%PowerGuardian's supplier scores and rankings are editorially independent. Commercial arrangements never affect them. Our Supplier Intelligence Engine is built to ingest Trustpilot signals, Ofgem complaint data, tariff tracking, customer-service monitoring, direct-debit monitoring and supplier news for automated score updates as those feeds are connected. Always verify pricing on a supplier's own website before switching.
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