Leonard Flowers is first listed in the Abbots Langley Parish Magazine Roll of Honour in September 1914 serving as a Sergeant with the Royal Marines (RM) aboard HMS “Astra”. This suggested that at the outbreak of War Leonard was a full-time Marine. At some point in 1916 he transferred to the Royal Marine Light Infantry (RMLI) serving aboard HMS “Antrim”, and in 1917 he moved on to the Royal Marine Artillery serving on various ships. Leonard was listed in the Autumn 1918, Spring 1919 and Autumn 1919 Absent Voter Records serving aboard HMS “Mantua”, patrolling Home Waters, and his home address was given at Asylum Road, Abbots Langley. He continued his Naval career after the War.
Leonard was born in 1887 at Boxmoor. He was one of eight children (five sons and three daughters) born to Henry and Elizabeth Flowers. At the time of the 1901 Census the family lived at the Model Cottages at Troley Bottom, Abbots Langley. Henry, who had previously been employed as an Asylum Attendant (1891) worked as a General Labourer. By 1911 the family had moved to Asylum Terrace, and Henry worked as a Roadsman for the County Council. Leonard was not listed at the family home in the 1911 Census, which might signify that he had joined the Royal Marines by that time.
Leonard Flowers survived the War, as did his brother Harry. However his other brother, Aubrey, who had emigrated to Canada sometime between 1911 and 1914, served with the Canadian Expeditionary Force was killed in action on 24th April 1916 at Ypres. His brother in law, Arthur Kimble, who had married his sister Agnes, died at a Base Hospital on the French coast at Le Treport on 15th April 1915, from wounds sustained at the Battle of Neuve Chappelle.