UK Energy Supplier Monitor
Monitor supplier performance, customer service standards, tariff competitiveness and consumer risk indicators across the UK energy market.
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Current Supplier Watch
Top Rated Supplier
Octopus Energy
Overall score 91/100
Most Improved This Month
Octopus Energy
+1 points
Supplier Under Watch
ScottishPower
Status: Watchlist
Best Value Tariff Provider
Octopus Energy
Tariff score 96/100
Best Customer Service
Octopus Energy
Service score 92/100
Biggest Complaints Reduction
Octopus Energy
Complaint score 88/100
Supplier Dashboard
Live performance snapshot for every monitored UK energy supplier, refreshed automatically every week.
Octopus Energy
Updated 27 Jul 2026
So Energy
Updated 27 Jul 2026
EDF Energy
Updated 27 Jul 2026
OVO Energy
Updated 27 Jul 2026
Utility Warehouse
Updated 27 Jul 2026
E.ON Next
Updated 27 Jul 2026
British Gas
Updated 27 Jul 2026
Co-op Energy
Updated 27 Jul 2026
ScottishPower
Updated 27 Jul 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 51/100.
- Co-op Energy
Customer service score sitting at 50/100.
- ScottishPower
Customer service score sitting at 44/100.
Complaint Concerns
- Co-op Energy
Complaint risk indicator at 48/100.
- ScottishPower
Complaint risk indicator at 42/100.
Tariff Changes
- Utility Warehouse
Tariff competitiveness slipping at 54/100.
- British Gas
Tariff competitiveness slipping at 55/100.
- Co-op Energy
Tariff competitiveness slipping at 50/100.
Supplier League Table
| # | Supplier | Overall | Status | Move | |
|---|---|---|---|---|---|
| 1 | Octopus Energy | 91 | Stable | View | |
| 2 | So Energy | 78 | Stable | View | |
| 3 | EDF Energy | 74 | Stable | View | |
| 4 | OVO Energy | 63 | Stable | View | |
| 5 | Utility Warehouse | 61 | Stable | View | |
| 6 | E.ON Next | 60 | Stable | View | |
| 7 | British Gas | 56 | Stable | 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 is fully independent and receives no commission from any energy supplier. 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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