Consumer champion Martin Lewis has warned that householders could be hit with an unwelcome rise in their energy bills on January 1.
Ofgem will update its price cap from January 1, meaning a discount on bills will change slightly. It means customers could have their energy bills increased.
MoneySavingExpert founder Martin said: "The energy price guarantee was meant to guarantee prices until the end of March (when we know the cost people pay will increase by 20%). So it will come as a surprise to many to see prices change in January.
