Royal Mail union loses appeal to overturn injunction to halt strike

(Reuters) - Britain's Royal Mail on Thursday confirmed that its biggest union lost an appeal to overturn a High Court injunction to stop a strike ahead of a general election and holiday season next month.The Communications Workers Union (CWU) had lodged an appeal with Britain's High Court last week after the former postal monopoly won the injunction to avert the first national strike by its workers in a decade.The union separately confirmed in a tweet..