The London Constitutional Conference of 1957 was a meeting held between representatives of the British government and Nigeria to discuss constitutional reforms and a move towards self-government. Six important decisions taken at the conference are:

1. Creation of a Federal System: One of the major decisions taken was the creation of a federal system in Nigeria, which divided the country into three regions: Northern, Eastern, and Western regions. Each region was given autonomy over its internal affairs and was allowed to have its own legislative assembly.
2. Creation of a Federal Capital Territory: Another important decision was the creation of a Federal Capital Territory (FCT) in Lagos, which would be the federal capital of Nigeria. This decision was taken to ensure that no region was given undue advantage over the others.
3. Introduction of a Parliamentary System: The conference also agreed to introduce a parliamentary system of government, where the Prime Minister would be the head of government and the Queen would be the Head of State.
4. Creation of a Council of Ministers: The conference established a Council of Ministers, which would be responsible for advising the Governor-General on all matters relating to the federal government.
5. Creation of a Central Bank: The conference also agreed to establish a central bank for Nigeria, which would be responsible for managing the country’s monetary policy.
6. Constitutional Amendments: Finally, the conference agreed to make a number of constitutional amendments, including the establishment of a new constitution for Nigeria, the abolition of the power of the Governor-General to veto legislation, and the creation of a new electoral system to ensure fair representation of all regions in government.