Leslie was born in Wolverhampton on 19 October 1900, the son of James and Gertrude. In 1901, he was living with his parents at 95 Gordon Street, Wolverhampton. By 1911, they were at 3 Railway Street, Heath Town, and Leslie had gained four brothers – James Lionel, William Henry, Cyril John, and a baby brother who was under a month old and was as yet unnamed. At some point, Leslie worked as a clerk with the London & North Western Railway at Wolverhampton station.
Leslie joined the Royal Navy Volunteer Reserve at Bristol (number Z/12036) and served at the Royal Navy Depot at Crystal Palace. He died on 13 October 1918, just short of his 18th birthday. In the “Naval Casualties, Indexes, War Grave Rolls and Statistics Book” held at The National Archives but available online via Ancestry, his cause of death is given as “3”, but there does not appear to be a key to what the different numbers mean. Other sources give his cause of death as “died from disease”. He is buried at Holy Trinity Churchyard in Heath Town. By the date of his death, his parent’s address was 6 Crowther Street, Park Village, Wolverhampton. Leslie is remembered on the Heath Park Roll of Honour, as well as on the memorial at Wolverhampton Railway Station.