Anyone know nything about this pic? found it in my grampas photo collection looks like a RAF guy signing the tail of a german fighter. any ideas?

WW2 Pic

A portrait of Hugh Dowding during war. the date of the photograph is unconfirmed.

Air Cheif Marshal Hugh Dowding

Near El Adem, turn-off of the Bardia Road, Libya, May 1941. A broken propeller blade and a wooden cross mark the grave of the Sergeant J.H.G Webster, Hurricane’s pilot of the No 73 Squadron Royal Air Force, killed in action on 14 April 1941. Nearby the grave the wreck, completely burned, of his plane. Two private of Headquarters, 26th Australian Infantry Brigade, pay their respects. Victor Sierra