Born on August 26, 1912, the same year the Titanic sank, Tinniswood became the world’s oldest living man in April 2024 following the death of Juan Vicente Pérez from Venezuela, who lived to be 114 years old. Throughout his life, Tinniswood attributed his longevity to practicing moderation and often remarked that he believed his long life was due to “pure luck.”

During World War II, Tinniswood served in the Royal Army Pay Corps, where he was responsible for financial administration and logistics. After the war, he worked as an accountant for major companies such as Shell and BP. A lifelong supporter of Liverpool FC, he enjoyed a simple diet that included a traditional Friday treat of battered fish and chips.
Tinniswood is survived by his daughter Susan, four grandchildren, and three great-grandchildren. His remarkable life spanned significant historical events and changes in society, making him a cherished figure not only in his family but also in the community.