EDF Energy has become the latest energy supplier to announce a price cut, saying it will reduce its gas bills by more than 10%. It said the move, which comes into effect on 15th June, will cut the average bill of those customers who buy both gas and electricity by £63 a year. But the French-owned firm said it would not be reducing its electricity prices. Last week, energy watchdog Ofgem publicly urged EDF customers to switch supplier in order to save money. Ofgem said EDF and Scottish Power had failed to pass on this year’s reduction in wholesale prices. EDF’s announcement means that Scottish Power is now the only firm among the “big six” UK energy suppliers not to have cut prices since British Gas first reduced its bills in February. EDF - which has 5.5 million UK customers - said it would not be reducing its electricity prices because its electricity bills saw the smallest price rises compared with competitors last year. British Gas announced a further price cut last week, reducing its electricity bills by an additional 6%, and gas by 3%, with immediate effect. The UK’s other main electricity and gas suppliers are Npower, Powergen, and Scottish & Southern Energy.