Chief minister is a term used retroactively by historians to describe servants of the English monarch who presided over the government of England, and after 1707, Great Britain, before 1721.
In the 13th century, after the loss of the Angevin territories in France, the justiciar's power declined as monarchs resided permanently in England.
The chancellor served as Keeper of the Great Seal, presided over the Privy Council and Parliament, and led the High Court of Chancery.
and Cynethryth and Cynethryth Harold I (1035–1040) Harthacnut (1040–1042) Edward the Confessor(1042–1066) and Gytha Thorkelsdóttir Poitiers Berwick-upon-Tweed This is very true: for my words are my own, and my actions are my ministers.In 1660, the leadership of the Commonwealth recalled Charles II and the chief minister became responsible to some extent to Parliament as leader of a ministry, although much of the time King Charles was in effect his own chief minister.
As a stopgap, Parliament elected Thomas Parker, 1st Earl of Macclesfield Regent, or "acting king" until the new monarch arrived to take his crown.