Complex sentence: He did not go to university, but instead began his career in journalism at the "Kensington News", later spending a period in South Africa where he developed a hostility to the situation created there by the emergence of apartheid.
Split into simpler sentences: He did not go to university, but instead began his career in journalism at the "Kensington News". While there, he developed a hostility to the situation created there by the emergence of apartheid.