monarch_name |         pm_name          | reign_start | reign_end  | term_start |  term_end
--------------+--------------------------+-------------+------------+------------+------------
 Victoria     | Benjamin Disraeli        | 1837-06-20  | 1901-01-22 | 1868-02-27 | 1868-12-03
 Victoria     | William Ewart Gladstone  | 1837-06-20  | 1901-01-22 | 1868-12-03 | 1874-02-20
 Victoria     | Benjamin Disraeli        | 1837-06-20  | 1901-01-22 | 1874-02-20 | 1880-04-23
 Victoria     | William Ewart Gladstone  | 1837-06-20  | 1901-01-22 | 1880-04-23 | 1885-06-23
 Victoria     | Lord Salisbury           | 1837-06-20  | 1901-01-22 | 1885-06-23 | 1886-02-01
 Victoria     | William Ewart Gladstone  | 1837-06-20  | 1901-01-22 | 1886-02-01 | 1886-07-25
 Victoria     | Lord Salisbury           | 1837-06-20  | 1901-01-22 | 1886-07-25 | 1892-08-15
 Victoria     | William Ewart Gladstone  | 1837-06-20  | 1901-01-22 | 1892-08-15 | 1894-03-05
 Victoria     | Earl of Rosebery         | 1837-06-20  | 1901-01-22 | 1894-03-05 | 1895-06-25
 Victoria     | Lord Salisbury           | 1837-06-20  | 1901-01-22 | 1895-06-25 | 1902-07-11
 Edward VII   | Lord Salisbury           | 1901-01-22  | 1910-05-06 | 1895-06-25 | 1902-07-11
 Edward VII   | Arthur Balfour           | 1901-01-22  | 1910-05-06 | 1902-07-11 | 1905-12-05
 Edward VII   | Henry Campbell-Bannerman | 1901-01-22  | 1910-05-06 | 1905-12-05 | 1908-04-05
 Edward VII   | Herbert Henry Asquith    | 1901-01-22  | 1910-05-06 | 1908-04-05 | 1916-12-07
 George V     | Herbert Henry Asquith    | 1910-05-06  | 1936-01-20 | 1908-04-05 | 1916-12-07
 George V     | David Lloyd George       | 1910-05-06  | 1936-01-20 | 1916-12-07 | 1922-10-23
 George V     | Andrew Bonar Law         | 1910-05-06  | 1936-01-20 | 1922-10-23 | 1923-05-23
 George V     | Stanley Baldwin          | 1910-05-06  | 1936-01-20 | 1923-05-23 | 1924-01-22
 George V     | Ramsay MacDonald         | 1910-05-06  | 1936-01-20 | 1924-01-22 | 1924-11-04
 George V     | Stanley Baldwin          | 1910-05-06  | 1936-01-20 | 1924-11-04 | 1929-06-05
 George V     | Ramsay MacDonald         | 1910-05-06  | 1936-01-20 | 1929-06-05 | 1935-06-07
 George V     | Stanley Baldwin          | 1910-05-06  | 1936-01-20 | 1935-06-07 | 1937-05-28
 Edward VIII  | Stanley Baldwin          | 1936-01-20  | 1936-12-11 | 1935-06-07 | 1937-05-28
 George VI    | Stanley Baldwin          | 1936-12-11  | 1952-02-06 | 1935-06-07 | 1937-05-28
 George VI    | Neville Chamberlain      | 1936-12-11  | 1952-02-06 | 1937-05-28 | 1940-05-10
 George VI    | Winston Churchill        | 1936-12-11  | 1952-02-06 | 1940-05-10 | 1945-07-26
 George VI    | Clement Attlee           | 1936-12-11  | 1952-02-06 | 1945-07-26 | 1951-10-26
 George VI    | Winston Churchill        | 1936-12-11  | 1952-02-06 | 1951-10-26 | 1955-04-07
 Elizabeth II | Winston Churchill        | 1952-02-06  |            | 1951-10-26 | 1955-04-07
 Elizabeth II | Anthony Eden             | 1952-02-06  |            | 1955-04-07 | 1957-01-10
 Elizabeth II | Harold Macmillan         | 1952-02-06  |            | 1957-01-10 | 1963-10-18
 Elizabeth II | Alec Douglas-Home        | 1952-02-06  |            | 1963-10-18 | 1964-10-16
 Elizabeth II | Harold Wilson            | 1952-02-06  |            | 1964-10-16 | 1970-06-19
 Elizabeth II | Edward Heath             | 1952-02-06  |            | 1970-06-19 | 1974-03-04
 Elizabeth II | Harold Wilson            | 1952-02-06  |            | 1974-03-04 | 1976-04-05
 Elizabeth II | James Callaghan          | 1952-02-06  |            | 1976-04-05 | 1979-05-04
 Elizabeth II | Margaret Thatcher        | 1952-02-06  |            | 1979-05-04 | 1990-11-28
 Elizabeth II | John Major               | 1952-02-06  |            | 1990-11-28 | 1997-05-02
 Elizabeth II | Tony Blair               | 1952-02-06  |            | 1997-05-02 | 2007-06-27
 Elizabeth II | Gordon Brown             | 1952-02-06  |            | 2007-06-27 | 2010-05-11
 Elizabeth II | David Cameron            | 1952-02-06  |            | 2010-05-11 |
(41 rows)