Lieutenant-Colonel William David Allan OBE (4 November 1879 – 9 January 1961) was a British soldier and police officer.
He was educated at Elgin Academy and Blundell's School and commissioned a second lieutenant in the 3rd (Morayshire) Volunteer Battalion, Seaforth Highlanders on 4 January 1902.
[1] He transferred to the Regular Army, in the Black Watch, on 8 February 1902,[2] and served with his regiment in the Second Boer War in South Africa.
After the end of hostilities there in June 1902, he left Cape Town with other men of the regiment on the SS Orissa, which arrived at Southampton in late October 1902.
[4] On 20 June 1910, he became adjutant (and promoted temporary captain) of the 10th (Cyclist) Battalion, Royal Scots (Territorial Force).