Regnal years of English monarchs Britain), from 1066 to the present day. These are official "de jure" dates, and may or may not coincide with whether a particular king had "de facto" power or not at that time. For example, as the Commonwealth era was suppressed in the official record, the regnal years of Charles II are measured from 30 January 1649 (the day his father Charles I was executed); as a result, when Charles II actually became king, on 29 May 1660, he was already in his 12th regnal year. (For the "de facto" tabulation of English rulers, see any conventional list of English
Unionism in Scotland a personal union from 1603, when King James VI of Scotland also became King James I of England and Ireland, resulting in the "Union of the Crowns". A political union between the Kingdoms of Scotland, England and Ireland was temporarily formed when the crowns were overthrown as a result of the English Civil War, with Oliver Cromwell ruling over the whole of Great Britain and Ireland as Lord Protector. This period was known as the Protectorate, or to monarchists as the interregnum. The monarchies were subsequently restored in 1660, with Scotland reverting to an independent kingdom sharing the same monarch