Sergeant S R Morris killed in a flying accident 1938

Hi all,
Sergeant S R Morris was killed in a flying accident in September 1938 whilst with 1 EFTS at Hatfield. He crashed in an Audax in Edmonton, London.
I am trying to find the location of his grave for some research I have doing into the accident and would be greatful if anyone could point me in the right direction.
Gerry