British Gas owner Centrica should "exercise restraint" with tarriffs after profits from its residential energy arm rose by 3.2% to £356 million, an energy minister said.
The supplier cashed in on the freeze in the first half of the year after raising tariffs by 6% in December.
Michael Fallon said: "What matters is not just the profits, it's the prices that we all have to pay and there was a big price increase just before last winter, over 6%, so I would hope that Centrica would now exercise restraint and that we are not going to see similar price jumps."
More top news
Britain was warned by the government's immigration adviser it was becoming more divided as diversity increases.
Tonight mist and fog will spread northeastwards across much of England and parts of Wales. The Met Office have issued a Fog Warning.
The UK is facing "sharper disparities" in inequality despite wider global growth, but monetary policy is not to blame, Mark Carney has said.