Health experts who have called for a 20% tax on sugary soft drinks say the move could raise more than £275 million each year for the treasury - around 8 pence per person, per week.
This saving "could be used to increase NHS funding during a period of budget restrictions or to subsidise foods with health benefits, such as fruit and vegetables," researchers from Oxford and Reading universities said.
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The man, who was in his 30s, has not been identified, while several other people are believed to have suffered serious injuries.
The Olympian was one of several sports stars who opened up to the prince during an event for his mental health charity Heads Together.
There will be sunny spells, with temperatures peaking at 23 Celsius (73F). However, Northern Ireland will experience frequent showers.