My mum used to be good friends with a former racing driver. I can't remember his name, and he retired a long time ago. She met him long after he retired (they were both pensioners). She said he told her he had retired because a lot of of mates were getting killed.
He showed mum a lot of photos from his career, including with Princess Margaret who apparently bought his rolls royce.
I only met him a few time when he picked mum up. Mum said he gave her a very smooth ride