In 1945, representing the Young African Progressive League, he attended the fifth
Pan-African Congress in
Manchester. Also in attendance were
Hastings Banda,
W. E. B. Du Bois,
Jomo Kenyatta,
Kwame Nkrumah and
Jaja Wachuku to name just a few. In the mid 1950s, Adeniran served as a member of the National Executive Committee of the
National Council of Nigeria and the Cameroons. He was the President of NCNC Youth Association and in 1959, he became a member of the parliament Adeniran was the leader of the Lagos progressives that merged with three other groups to form the
Nigerian People's Party (NPP) during the Second Republic. He later became the chairman of the Nigerian People's Party (NPP) succeeding Olu Akinfosile after he had previously lost to
Lateef Jakande for a seat in the Lagos Government House. He was the first
Attorney General of Lagos and later became the Commissioner of Education. ==Recognitions and legacy==