On 13 April 1915, he was
killed in action near
Laventie, three weeks after arriving in France. Also commemorated on the gravestone is his cousin William Herbert Gladstone, MC, son of Stephen and Annie Gladstone, killed in action in 1918. As a memorial, a
rood was installed at St Deiniol's, Hawarden, and a new theatre and wards at
Chester Royal Infirmary. Gladstone is also commemorated on Panel 8 of the
Parliamentary War Memorial in Westminster Hall, one of 22 MPs who died during the War to be named on that memorial. Gladstone is one of 19 MPs who fell in the war who are commemorated by heraldic shields in the Commons Chamber. A further act of commemoration came with the unveiling in 1932 of a manuscript-style
illuminated book of remembrance for the House of Commons, which includes a short biographical account of the life and death of Gladstone. After his death, the estate was purchased by an uncle
Henry Gladstone, the third son (and seventh child) of William and Catherine.
Herbert Gladstone, another uncle, wrote a
memoir of him that was published in 1918. File:Rood cross in St Deiniol's Church, Hawarden, in 1917.jpg|1917 picture of the
rood at
St Deiniol's Church, Hawarden, designed by
Giles Gilbert Scott File:Eglwys St Deiniol's Church Penarlag Hawarden Flintshire Wales 28.JPG|1999 picture of the
rood at St Deiniol's Church, Hawarden ==Honours==