McDonald’s customer was horrified when they lifted up their burger bun and found a mystery ingredient – what appears to be a dead insect.The punter ordered a Big Tasty from the McDonald's restaurant in Parsonage Retail Park in Wigan, Greater Manchester.Uber Eats delivered their order just after 9pm but they were immediately put off their meal after spotting the offending 'bug'.They posted a picture of the gross find online and added: "McDonald’s Parsonage Retail Park, make sure you check inside your burgers, knocked me sick."McDonald’s confirmed to Manchester Evening News that it has launched an investigation.A spokesperson said: “We are sorry to hear about this customer’s experience.
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