Overview
- Which? published its 2026 assessment using a survey of almost 12,000 customers and a review of 17 suppliers’ policies and practices.
- E (Gas and Electricity) led with a 79% score and high recommendation rates, followed by Octopus Energy at 74%, with 100Green and Sainsbury’s Energy also scoring strongly and all four named Which? Recommended Providers.
- Scottish Power placed last with 56% and the lowest complaints‑handling score, EDF scored 58% due to limited contact hours, and British Gas scored 59% with issues cited on complaints resolution and switching.
- Coverage notes methodological caveats, including that E’s top score was based on feedback from only 92 surveyed customers.
- Suppliers challenged or contextualised the findings, with Centrica citing falling complaints and service investment, EDF pointing to strong Trustpilot ratings and support measures, Scottish Power referencing the Citizens Advice scorecard, and British Gas highlighting Ofgem’s recent satisfaction data.