I just found confirmation on F/L Duval’s MID. It was indeed award for his Escape and Evasion
Source: UK, Recommendations for Honours and Awards, 1935-1943

- IMG_2721.jpeg (169.48 KiB) Viewed 105990 times

- IMG_2722.jpeg (116.27 KiB) Viewed 105990 times

- IMG_2720.jpeg (199.12 KiB) Viewed 105990 times