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LONDON (Reuters) - Britain's Scottish Power will raise its duel domestic gas and electricity prices by 7.8 percent, it said on Friday.
Fellow ‘big six’ energy supplier, Centrica (CNA.L) owned British Gas, said on Friday it would freeze its standard tariff until August.
Britain's energy companies are under close scrutiny from the government, after sector regulator Ofgem said earlier this year it did not see a case for power companies to significantly increase their prices.
Scottish Power, owned by Spanish utility Iberdrola (IBE.MC), said its electricity prices will increase by an average of 10.8 percent and gas prices by an average of 4.7 percent from March 31.
The company said the rises were needed after an increase in wholesale gas and electricity prices, decarbonisation costs and the government's smart metre upgrade scheme.
Around one third of Scottish Power customers, or 1.1 million households, will be affected by the change.
Reporting By Susanna Twidale; Editing by David Goodman and Susan Thomas