This might be the most embarassingly priced market on the site.

https://arxiv.org/abs/2304.10970

https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/healthandlifeexpectancies/articles/lifeexpectancycalculator/2019-06-07

This probably underestimates King Charles's life expectancy (his parents lived to 99 and 96), but it assumes he doesn't abdicate.

What would lead to resolution?

presumably King Charles's unfortunate demise, whether from being reduced to paperclips or otherwise