Editing Coregency (section)

===Britain===
{{Main|Government of the United Kingdom|List of British monarchs|List of English monarchs}}
{{Unreferenced section|date=July 2022}}

King [[Henry II of England]] installed his eldest surviving son, also named Henry, as junior king. [[Henry the Young King]] was not permitted to exercise royal authority and his title as co-king was effectively a [[sinecure]] to denote his status as his father's chosen heir. Young Henry predeceased his father without ever ascending to the throne and is not included in the official [[list of English monarchs]].

The [[Monarchy of the United Kingdom#English monarchy|Monarchy of England]] experienced joint rule under the terms of the [[Act for the Marriage of Queen Mary to Philip of Spain|act sanctioning the marriage]] of [[Mary I of England|Mary I]] to [[Philip II of Spain]]. Philip notionally reigned as king of England (inclusive of [[Wales]]) and Ireland [[jure uxoris|by right of his wife]] from 1554 to 1558. Similarly, following the [[Glorious Revolution]], [[Mary II of England|Mary II]] and her husband [[William III of England|William III]] held joint sovereignty over the kingdoms of England, Scotland, and Ireland from 1688 to 1694.