Divorce has bedeviled Britain's royal family for centuries.
It has created problems not only when Prince Charles and Princess Diana ended their marriage in the most bitter fashion in 1996 but also when other royals — Princess Margaret — fell in love with people who had been divorced and could not marry them for that reason.
The British monarch also serves as Supreme Governor of the Church of England, which historically refused to bless the unions of anyone with a living ex-spouse. The church softened its position in 2002 to allow divorced individuals to remarry under "exceptional circumstances."
In 1936, drama over a divorced American woman led King...