LONDON (AFP) - Energy firm Centrica reported group operating profits of a whooping 992 million pounds for the six months to June 30.
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Though the figure is 19 percent below last year, it was still 100 million pounds more than the 880 million expected by City forecasts.
The figures came in as the company on Wednesday announced a hike in domestic gas prices by 35 percent and electricity prices by nine percent because of the rocketing cost of wholesale energy.
The owner of British Gas said in a statement that wholesale costs were sharply higher because of falling gas reserves in Britain, record high oil prices and rampant global energy demand particularly from Asia.
"British Gas today (Wednesday) announced that soaring wholesale energy prices have forced it to increase tariffs for domestic gas and electricity," the group said.
"Wholesale gas prices for the coming winter have increased by 89 percent on the previous winter." That was an increase in market commodity costs of around 2.0 billion pounds, it added.
British Gas is the country's largest household gas supplier with 15.9 million customers.
Increasing global energy demand was cited as a major reason for sky-high wholesale costs.
"Countries in all parts of the world, including fast-growing Asian economies, are attracting gas cargoes at oil-inflated high prices and thus the volume of gas shipped to the UK has fallen 60 percent," Centrica said.
The group's new prices came into immediate effect and followed a round of hikes last week by the British division of Electricite de France (EDF).
"We very much regret that we have had to make this decision at a time when many household budgets are already under pressure," said British Gas managing director Phil Bentley in the release.
"The simple fact though, is that we have entered an era of unprecedented high world energy prices.
"The only answer to cope with higher energy prices, I'm afraid, is for all of us to be more energy efficient and we will be contacting all our British Gas customers to show how they can save energy to try and offset these price rises."
All major energy providers in Britain announced large price increases in the first three months of this year, while Centrica had signalled in May that it could ramp them up again.
In commodity markets earlier this month, oil prices hit record highs above 147 dollars per barrel amid tight crude supplies, geopolitical fears in key producers Iran and Nigeria, and runaway energy demand from China and India.
London's Brent crude oil jumped to a historic peak of 147.50 dollars per barrel on July 11.
Crude prices have since tumbled by about 25 dollars per barrel on worries about weakening US energy demand, traders said. However, they remain more than 20 percent higher than at the start of the year.
Meanwhile, runaway oil prices and soaring domestic energy costs are helping to fuel rising inflation in Britain.
The country's 12-month inflation jumped to a 16-year high point of 3.8 percent in June, owing to big rises for fuel and food, according to recent official data.