Bobs Worth, the 11-4 favourite ridden by Barry Geraghty, has won horse racing's famous Gold Cup at the Cheltenham Festival.
Sir Des Champs, ridden by AP McCoy, was second at 4-1, followed by 7-2 Long Run, ridden by Sam Waley-Cohen.
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In the unexpected announcement on Monday, Mr Key said it was the "right time" to leave politics.
As the Government's Brexit appeal comes to the Supreme Court, here's a look at what you need to know.
According to local reports, the man was found by friends in their accommodation in Val Thorens resort in the Alps on Sunday morning.