Energy providers will have to improve their services by "£12 a year less" than they normally would and then pass those savings on to consumers, OfGem have announced.
Speaking on Good Morning Britain OfGem's Maxine Frerk, said the changes should come into force "from next April" and savings "should flow into customer's bills from that point".
More top news
Spiders are able to travel across water like ships, using their legs as sails and silk as an anchor, according to new research.
Patient care will suffer if the Chancellor does not announce additional NHS funding in next week's budget, a think tank has warned.
Life-changing gene therapy for cystic fibrosis sufferers could be available in the next five years following a landmark trial.