Noel Proctor Warden was killed on October 1, 1941. He is the second pilot on the left.
John Engelsted added this comment on this blog.
Warden was flying Spitfire Vb W3422 when he was killed.
Why am I telling you all this...?
Because someone else wrote me about this same picture. He is the nephew of the pilot on the right, Jean Demozay.