[3] He fought in World War I, and was attached to the Royal Flying Corps from April 1915.

After the war, he continued to serve with the Eton OTC until 1924 when he resigned his commission and was granted the honorary rank of lieutenant.

[8] They had six children, the oldest of whom was Sir Erskine William Gladstone of Fasque and Balfour, the 7th Baronet.

Gladstone became a deputy lieutenant of Hampshire in 1929,[9] and was the Vice-Lieutenant between 1948[10] and 1968, and was a justice of the peace (JP) for Flintshire.

His son inherited the Baronetage under the appellation of Sir William Gladstone, 7th Baronet.