Treaty of Union took effect on 1 May 1707. Queen Elizabeth I of England and Ireland, last monarch of the Tudor dynasty, died without issue on 24 March 1603, and the throne fell at once (and uncontroversially) to her first cousin twice removed, James VI of Scotland, a member of House of Stuart and the only son of Mary, Queen of Scots. By the Union of the Crowns in 1603 he assumed the throne of the Kingdom of England and the Kingdom of Ireland as King James I. This personal union lessened the constant English fears of Scottish cooperation with France in a
Pretender last native Prince of Wales. He was indeed proclaimed Prince of Wales by his supporters on 16 September 1400, and his revolt in quest of Welsh independence was not quashed by Henry IV until 1409. Later, however, one of Glyndŵr's cousins, Owain Tudor, would marry the widow of Henry V, and their grandson would become Henry VII, from whom the current British monarch is descended (through his daughter Margaret Tudor, who married James IV of Scotland). The various minor kingdoms that came together to form what is today known as the Principality of Wales each had their own royal dynasty.