British Gas owner Centrica says it expects to achieve full-year adjusted earnings per share at the top of the range forecast by analysts.
It comes after a strong operational performance in the first four months of the year, but also as calls grow for energy firms to face a windfall tax to ease the cost of living crisis.
Centrica said its nuclear and gas production assets in the UK had secured increased volumes of gas and renewable energy, improving security of supply for the UK and Europe at a time of pressure due to the Russian invasion of Ukraine.
It also said that it has “managed increased commodity price volatility well” in recent months.
But it warned that supply disruptions and higher inflation are likely to continue to offset operational progress.
It said: “In British Gas Services & Solutions we have seen some supply chain disruption and higher inflation impacting both the cost base and customer demand.