| Term | Leader | % Correct |
|---|---|---|
| 2019- | Boris Johnson | 98%
|
| 2016-2019 | Theresa May | 98%
|
| 2005-2016 | David Cameron | 97%
|
| 1975-1990 | Margaret Thatcher | 97%
|
| 1940-1955 | Winston Churchill | 97%
|
| 1990-1997 | John Major | 94%
|
| 1965-1975 | Edward Heath | 84%
|
| 1957-1963 | Harold Macmillan | 83%
|
| 1937-1940 | Neville Chamberlain | 83%
|
| 1955-1957 | Anthony Eden | 76%
|
| 1963-1965 | Alec Douglas-Home | 74%
|
| 1997-2010 | William Hague | 72%
|
| 2001-2003 | Iain Duncan Smith | 69%
|
| 1868-1881 | Benjamin Disraeli | 65%
|
| 2003-2005 | Michael Howard | 61%
|
| 1923-1937 | Stanley Baldwin | 61%
|
| 1922-1923 | Andrew Bonar Law | 55%
|
| 1916-1922 | Andrew Bonar Law | 55%
|
| 1834-1846 | Sir Robert Peel | 54%
|
| 1885-1902 | Robert Gascoyne-Cecil | 46%
|
| 1828-1834 | Arthur Wellesley | 40%
|
| 1902-1911 | Arthur Balfour | 38%
|
| 1846-1868 | Edward Smith-Stanley | 27%
|