Noel Proctor Warden was killed on October 1, 1941. He is the second pilot on the left.
This is all the information I found on the Internet.
Name: WARDEN, NOEL PROCTOR
Initials: N P
Nationality: United Kingdom
Rank: Pilot Officer
Regiment/Service: Royal Air Force Volunteer Reserve
Unit Text: 91 Sqdn.
Date of Death: 01/10/1941
Service No: 100592
Additional information: Son of Norman Charles and Eva Warden, of Andover, Hampshire.