Some of Britain's largest energy suppliers have been put to the test following an investigation from Citizens Advice. The charity has created a ranking system for both familiar energy firms and some lesser-known ones based on the quality of their customer service.
It highlighted that there has been "sluggish improvement" in terms of the quality of customer service across the energy industry.
Some major firms that were hit by notably low rankings include Utilita and EDF which both landed at the bottom of the ranking, only being slightly surpassed by Octopus Energy.
Ecotricity, which specialises in selling green energy, was the most favourable, surpassing major firms such as Ovo and Scottish Energy.
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