Complex sentence: Hudis left Pinewood and became a freelance writer, he was soon to become a prolific screenwriter of B movies during the 1950s, he was the writer for the biopic "The Tommy Steele Story".
Split into simpler sentences: Hudis left Pinewood and became a freelance writer and was soon to become a prolific screenwriter of B movies during the 1950s. He was the writer for the biopic "The Tommy Steele Story".