alternatehistory.com

AHC 1- no monarchical restoration after the English Civil War and execution of Charles I

AHC 1b - loophole, England can have a monarch again, but it has to be an Emperor, not a King

AHC 2 -less challenging challenge, but still challenging: Over 50% of the years from 1649-2015, England has no monarch. So, after 1649, the maximum number of years of England is under a monarch can be 183 years.
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