Camelot has lost a High Court action in which it accused a lotteries watchdog of failing in its legal duty to protect it from the "rival" Health Lottery.
In a written ruling, Lord Justice Stanley Burnton, who heard the case with Mr Justice Kenneth Parker, announced he would "refuse Camelot permission to proceed with its claim for judicial review, on the grounds of its delay and its failure to establish a claim with a real prospect of success".
He continued: "I would refuse it permission to amend its claim on the ground that its amended claim has no real prospect of success."
He said he agreed with the Commission "that the question whether multiple society lotteries should be permitted is a political question, to be determined by the Government or Parliament".
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