Royal Flying Corps.

Awarded the Distinguished Conduct Medal in the London Gazette of 28 March 1918.

Hopper was a native of Burnley, Lancashire.

The citation for the Distinguished Conduct Medal published in the London Gazette reads, "For conspicuous gallantry and devotion to duty. Whilst on reconnaissance duty, he, with his formation, was attacked by five enemy planes. Though stunned by a wound in his arm, with his engine out of action and his controls shot away, he succeeded in evading three of the enemy scouts which had closed on him, and crossed the line at a low altitude. He landed his machine without injury to himself or his observer. Later, he shot down two enemy planes completely out of control, and throughout he has shown the greatest vigor, determination and courage."