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The big win is the 47th that we've recorded since December 2009 and comes in well above the £873,724 average paid out. The all-time record for largest win is £2,148,947, which was picked up in 2013. This jackpot win is just shy of being a top-five winner, coming in just £7,000 short of making the list.
The IGT MegaJackpots progressive is tied to a series of different games. The prize grows with every spin of the reels and pays out completely randomly.
We'll update readers as we learn more about the big win.
Related: IGT MegaJackpots