May orders energy price cap, shares tumble

By Kate Holton and William JamesMANCHESTER, England (Reuters) - Prime Minister Theresa May said she would impose a price cap on the energy market to help millions of households struggling with rising prices, hitting shares in the leading providers hard.May had proposed a price cap on the sector earlier this year, the biggest market intervention since privatisation almost 30 years ago, but the plan was thrown into doubt after her ruling Conservatives lost their parliamentary majority in an electi