Harry was born in Stafford in 1886, the son of Thomas Wilson and Amy Lovatt. They were living at Wightwick House, Tettenhall, in 1901, along with Harry’s siblings Ronald S. and Dorothy P. K. and five servants. Harry was educated at Wellington College, Berkshire.
In August 1914, he enlisted as a Lieutenant with the South Staffordshire Regiment. In 1916, he transferred as a Major to the Royal Engineers, and served in France from 17 June 1916. On 5 June 1918 he was awarded the Military Cross in the New Year Honours List. This was announced in the Express & Star on 5 January 1918. A year later, in the 1919 New Year Honours List, he was awarded the OBE.
Harry married Winifred Olive Langley in Wolverhampton in 1911. The couple had three children – Stuart L. (1915), Josephine Leslie (1918) and Peter Leslie (1920). Harry died in Wellington, Shropshire, on 4 January 1960, by which date he was living at Meeson Hall in Shropshire. The value of his effects was £205632 10s. 8d..