Sir John Macpherson (Governor 1948–1955) launched in 1948 the most extensive constitutional consultation in colonial African history: village, divisional, provincial and regional conferences feeding into the 1950 General Conference at Ibadan. The 1951 constitution that emerged created Regional Councils of Ministers, a Federal Council of Ministers, and elected majorities in all three regions.
The constitution collapsed in March–April 1953 over the Self-Government Motion: Anthony Enahoro (Action Group) moved that Nigeria become self-governing in 1956; Northern Region members under the Sardauna of Sokoto opposed the timetable; the Western and Eastern delegations walked out; the Kano Riots of May 1953 followed. The Lyttelton Constitution of 1954 replaced it, establishing the federal structure that took Nigeria into Independence.