1885 Mar 29. .Born St Pancras, London
1901census at 50, Regents Park Road, St Pancras, London
1901 census at a Boarding school in Aldenham, Herts
1911 census at Alma Rd, St Albans
1915 Nov 14. Landed in France
1916 Sep 25 Commissioned 2nd Lt. The undermentioned, from Officers Cadet Units, to be 2nd Lts. (on prob.):
1917 May 30 MC Gazetted. 2nd Lt. Lionel John Gardner, R. West Surr. R., Spec. Res. For conspicuous gallantry and devotion to duty. He successfully attacked a party of the enemy on our flank and drove them out of their position. His courage and initiative undoubtedly saved a critical situation.
1918 Mar 26. The undermentioned 2nd Lts. to be Lts. :— R.W. Surr. R. L. J. Gardner, M.C.
1919 MAr 19. R.W. Surr. R.—Lt. L. J. Gardner, M.C., 3rd Bn., Spec. Res., relinquishes the actg. rank of Capt.
1919 Oct 17. LG Chevalier of the Ordre du, Merite Agricole. Lieutenant Lionel John Gardner, M.C., Royal West Surrey Regiment (Special Reserve).
1920 Apr 1. The undermentioned Lts. relinquish, their commns. 1st Apr. 1920: — 3rd R.W. Surr. R.—And retain the rank of Lt. : L. J. Gardner, M.C.
1921 Feb 11. Joined ADRIC with service no 1669, Posted to B Coy.
1922 Jan 23. Discharged on demobilisation of ADRIC
1927 - 1960 On electoral register in Camden
1939 Register. Living at 20 Tanza Road , Hampstead, London. He is "of private means" It is a guest house, and he is single.
1960 Feb 14. Died