What If the Future King of England, Scotland and Ireland Had Gone Down with the Gloucester in 1682?

Our story takes us back to the beginning of the Tudor monarchy. Under male-primogeniture, succession to the throne would appear straightforward but the history of royal succession under the Tudors and Stuarts was not always so. Religion and politics often played a role and therefore it becomes important to the question of who becomes the monarch of England, Scotland and Ireland, if James Stuart, the Duke of York, was not available to succeed his brother Charles II in 1685.