Agence France-Presse: Britain must invest between 95 billion and 200 billion pounds in power plants and other infrastructure over the next decade to secure energy supplies and meet climate change targets, watchdogs said on Friday. Energy regulator Ofgem said that the vast amounts, equivalent to investment of between 103 and 217 billion euros or 152 and 320 billion dollars, would push domestic energy bills up sharply. “The need for this investment arises at a time of volatile world energy prices and …