A five-year-old Prince William would have become heir apparent had King Charles perished in the 1988 Klosters avalanche that killed his close friend.
https://www.foxnews.com/entertainment/king-charles-deadly-avalanche-escape-heightened-awareness-lifes-fragility-expert
https://www.foxnews.com/entertainment/king-charles-deadly-avalanche-escape-heightened-awareness-lifes-fragility-expert