I'll check with some of my aviation/aerospace psychology experts and see if anyone knows anything about him.
Birley seems to have been a temporary lieutenant and then temporary major in the RAMC, attached to the Royal Flying Corps.
"IN the despatch dated November 7th, 1917, from Field-
Marshal Sir Douglas Haig, giving a list of names of those
whose distinguished and gallant services and devotion to duty
he considers deserving of special mention, the following are
included: Temp. Lieut. (Temp. Maj.) J. L. BIRLEY, M.B.,
R.A.M.C.;" Flight Magazine, 1917, p. 1329 Unfortunately, no more details in that article.
Flight, 16 Jan 1919, page 92 notes: "Maj. J. L. Birley to be actg. Lieut.-Col. while employed as Lieut.-Col. ; Oct, 1, 1918, seniority May 28, 1918."
He obviously survived the war, as there was a J.L. Birley writing articles in the medical journals on psychiatric topics up till at least the 1920s.
He was a member of the Committee responsible for publishing "the Report of the War Office Committee Enquiry into "Shell-Shock", 1922. At that time he apparently worked for the Aeronautical Ministry. That document is available on the web at:
http://books.google.com/books?id=O5_...Birley&f=false
There are lots of articles in the medical literature by JL Birley, up until the 1960s-1970s, but I don't know if it is the same guy. There also is a psychiatrist JLT Birley whose name recurs in searches.
Doc