Paul Newton, 55, was waiting in his car for a hairdressing appointment when he decided to check his emails.
The guitar salesman was thrilled when he thought he'd won a "brilliant" £1,106 but before he had the chance to double check, his iPad stopped working.
So he decided to look on his phone, where he eventually saw his actual prize - nearly £1.2m!
Paul, who comes from Weston-super-Mare, was quoted in the Bristol Post explaining: "I have bad eyesight but I looked again. Through my squinting, the numbers looked very big on the screen but I could clearly see it was actually over a million quid."
Cancelling his appointment, he got in touch with his wife, Tania, and told her he needed to urgently tell her something at home.
He said: "We have 110 steps in our house and I wouldn't tell her anything until we got inside. Once in there, I just yelled: 'We have won enough money to clear the mortgage and once that's done, we've got another million on top!'"
The couple, who have three grown-up children between them, plan to help out family and make a few home improvements. Despite their big win, they both plan to continue working.
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