who has been the longest reigning british monarch
List of monarchs in Britain by length of reign Queen Elizabeth II became the longest-reigning British monarch on 9 September 2015 when she surpassed the reign of her great-great-grandmother Victoria.[1][2] On 6 February 2017 she became the first British monarch to celebrate a sapphire jubilee, commemorating 65 years on the throne.
Monarchy of the United Kingdom The Sovereign's role as a constitutional monarch is largely limited to non-partisan functions, such as granting honours. This role has been recognised since the 19th century. The constitutional writer Walter Bagehot identified the monarchy in 1867 as the "dignified part" rather than the "efficient part" of government.[7]