Gubbins was commissioned into the Royal Field Artillery in 1914.

During the War, he served with the Royal Field Artillery.

He served in the Royal Field Artillery from 1917, returning to Oxford to complete his degree.

He was a gunner in the 466th Battery of the 65th Royal Field Artillery.

It formed the backbone of the Royal Field Artillery during the war, and was produced in large numbers.

The Royal Field Artillery was the largest arm of the artillery.

He was killed on the 8th December 1917, aged 28, while serving with the Royal Field Artillery.

In his forties he served in the Royal Field Artillery during the first world war.

He was a lieutenant with the Royal Field Artillery.

He was commissioned into the Royal Field Artillery in 1920.