A milder winter and energy efficiencies helped British Gas profits tumble by 26% in the first half of 2014.
Parent company Centrica predicts average bills will fall by around £90 this year because consumers are not using as much power.
However, industry regulator Ofgem has suggested that it sees power companies doubling their profit margins in the second half of the year.
They have already referred the Big Six energy companies to the competition authorities.
ITV News Correspondent Nina Nannar reports:
More top news
Some small businesses face increases of as much as 300%, which business owners say could signal the end of the High Street.
He told People Magazine: "I was in denial, but a part of me always knew this was coming."
A compound within the Conus regius snail's venom has been found to create long-lasting pain relief.