The man who died is thought to be in his early 50s.
The other man, reportedly in his 20s, suffered spinal and leg injuries and was taken to Addenbrooke's Hospital in Cambridge.
An investigation into the accident is underway.
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Rain may be heavy in places but should clear to sunny intervals and scattered showers later in the day.
Rain quickly spreads from the west, turning heavy over the higher ground. Sheltered eastern spots will escape the worst of the rain.
Marcus Willis, a current club coach ranked 772 in the world, came through six qualification matches to reach this year's tournament.