William Hill, the UK's number two bookmaker, has blamed legacy-technology issues with its in-house NextGen platform and a competitive market for missing earnings targets.
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The performance of the internet business, which makes up 12% of group earnings of £285m, has continued to be disappointing, it said in a trading statement.
It will scrap in NextGen at a cost of £26m and outsource the operation. The company said it was talking to Turf TV but warned that "the performance of the internet channel will remain challenged until the new technology solution is implemented".