Welcome to the forum.
Capt Whitehead had previously served with No. 60 Squadron over the Somme in 1916. (Alas there were two Lts Whitehead serving with the squadron at that time, which makes for a lot of sifting to identify which one was flying any particular aircraft).
You've probably much of that detail already but one incident worth noting is that his observer, Lt Walter Edward George Bryant, also survived being brought down on 30 July 1916.
Bryant later rose to the rank of Air Commodore:
https://www.rafweb.org/Biographies/Bryant.htm
He died in WWII but the lengthy period of service might allow for the possibility of Bryant's memoirs being complied or some anecdotes, reminiscences etc being featured in an article at some stage.
In short don't just focus on No. 65 Squadron: there might well be other resources (e.g. No. 60 Squadron) that could help build the bigger picture of Capt Whitehead's wartime life and death.