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but hang in until the end and you share the prize pot, which starts at about £500. Cash goes into to your PayPal account.

People have called it “Black Mirror-esque” and compared its last-man-standing style to movie The Hunger Games – and users cannot get enough.

Some contests on the more established US version have had up to two million people going against each other.

And last week it gave away a $250,000 jackpot as part of a promotion for the new Steven Spielberg movie Ready Player One.