Does anyone have the details leading to the loss of the following airman ?

Any help is appreciated.

Regards
Peter

Name: LLOYD, JOHN CYRIL
Initials: J C
Nationality: United Kingdom
Rank: Sergeant
Regiment/Service: Royal Air Force Volunteer Reserve
Date of Death: 04/09/1943
Service No: 973800
Casualty Type: Commonwealth War Dead
Grave/Memorial Reference: Grave 125.
Cemetery: ABERDYFI CEMETERY