<page_title> List of Prime Ministers of the United Kingdom by tenure </page_title> <section_title> Ordered by tenure </section_title> <table> <cell> The Earl of Liverpool <col_header> Prime Minister </col_header> </cell> <cell> 14 years, 305 days <col_header> Length served </col_header> </cell> <cell> The Marquess of Salisbury <col_header> Prime Minister </col_header> </cell> <cell> 13 years, 252 days <col_header> Length served </col_header> </cell> <cell> 3 <col_header> Tenures </col_header> </cell> <cell> Margaret Thatcher <col_header> Prime Minister </col_header> </cell> <cell> 11 years, 209 days <col_header> Length served </col_header> </cell> </table>
Thatcher's tenure as Prime Minister was 11 years and 209 days, while Lord Salisbury's was 3 years and 252 days, in three tenures, and the tenure of Lord Liverpool was, 14 years and 305 days.