| Tenure | Name | % Correct |
|---|---|---|
| 2005-2016 | David Cameron | 100%
|
| 1975-1990 | Margaret Thatcher | 100%
|
| 2016-present | Theresa May | 100%
|
| 1990-1997 | John Major | 95%
|
| 1940-1955 | Winston Churchill | 88%
|
| 2001-2003 | Iain Duncan-Smith | 78%
|
| 1997-2001 | William Hague | 73%
|
| 1937-1940 | Neville Chamberlain | 71%
|
| 1921-1922 | Austen Chamberlain | 68%
|
| 2003-2005 | Michael Howard | 68%
|
| 1957-1963 | Harold Macmillan | 61%
|
| 1868-1881 | Benjamin Disraeli | 59%
|
| 1955-1957 | Anthony Eden | 56%
|
| 1965-1975 | Edward Heath | 56%
|
| 1963-1965 | Alec Douglas-Home | 54%
|
| 1923-1937 | Stanley Baldwin | 49%
|
| 1834-1846 | Sir Robert Peel | 46%
|
| 1911-1921 | Andrew Bonar Law | 44%
|
| 1922-1923 | Andrew Bonar Law | 44%
|
| 1902-1911 | Arthur Balfour | 29%
|
| 1885-1902 | Robert Gascoyne-Cecil | 29%
|
| 1846-1868 | Edward Smith-Stanley | 20%
|
| 1881-1885 | Stafford Northcote | 0%
|