| YEAR | DATE | EVENT | PRIME MINISTER | GENERAL GOVERNOR | 
| 1914 | 1 january | UK Colony |  | Sir Frederick John Dealtry Lugard | 
| 1919 | 8 august |  |  | Sir Hugh Charles Clifford | 
| 1925 | 13 november |  |  | Sir Graeme Thomson | 
| 1931 | 17 june |  |  | Sir Donald Charles Cameron | 
| 1935 | 1 november |  |  | Sir Bernard Henry Bourdillon | 
| 1940 | 1 july |  |  | Sir John Evelyn Shuckburgh | 
| 1942 |  |  |  | Sir Alan Cuthbert Maxwell Burns | 
| 1943 | 18 december |  |  | Sir Arthur Frederick Richards | 
| 1948 | 5 february |  |  | Sir John Stuart Macpherson | 
| 1954 | 1 october | UK Federation of Nigeria |  | Sir John Stuart Macpherson | 
| 1955 | 15 june |  |  | Sir James Wilson Robertson | 
| 1957 | 30 august |  | Sir Abubakar Tafawa Balewa |  |