As "LGL" in Alphabetic Register and "CE" in Numeric. There is no CE Alder as a RAF officer and LGL exists as a RFA officer who was also in RAF, so I believe that this is our man
1888 Jan 5. Born Chesterton, Cambridgeshire, son of Rev Herbert (clergyman) and Theresa Annie Alder
1891 census at Glenhailog House, Pt Little Llancayo, Gwehelog, Goytrey
1901 census at Royal Naval Schools, Crofton, Lee On Solent
1904 He was the cox of the Hereford Cathedral School XIII
1905 Nov 1. Apprenticed in City Of London
1911 Feb 3. Leaves UK for Brisbane, Australia on SS Otway.
1914 Aug 28. Enlisted in Australian Field Artillery. His trade is "kangaroo shooter"
1914 Sep 12. Discharged to No1 Light Horse
1914 Oct 20. Embarked for Europe
1915 Jun 4. Wounded at Gallipoli
1915 Jun 20. Arrives in Malta on Hospital ship
1915 Dec 9 Discharged to a commission in RFA in England
1916 Jun 1. Gets engaged to Monica Fair.
1919 Feb 17. Demobbed
1919 Mar 31. Leaves UK for New York. He is a "merchant"
1919 May 25 Arrives back in UK from New York. Eastbury Av, Northwood. A merchant whose last country of permanent residence was Australia
1920 Apr 1. The undermentioned Lts. relinquish their commns. And retain the rank of Lt.: — L. G. L. Alder.
1920 Oct 21. Joined ADRIC with service no 812
1920 Dec 24 Struck off strength - "not attested"
1931 Oct/Dec married in Deptford, London to Phyllis Maude Taylor
1934 Jun 23. Born a son in Bude, Devon to his wife Phyllis.
1939 Register. A Retired farmer living with wife Phyllis Maude at Village,Woolsery Bideford , Bideford R.D., Devon
1940 Jun 8, Royal Artillery. The undermentioned to be Lts.:— Lt. Lyonel Granville Lawrence Alder. (80523)
1956 Nov 26. Died in Isle of Wight aged 68