1897 Jul/Sep born Bromley, Kent
1901 census , he is living with family at Sannox, Hilldrop Church Av, Chislehurst, Kent. Son of a bank clerk.
1911 census, he is a boarder at The Brighton College School For Youths,
1915 Jul 28 Commissioned. The undermentioned Gentleman Cadets, from the Royal Military Academy, to be Second Lieutenants. Leslie Keith Lockhart. Gazette
1915 Nov 26. Arrives in France.
1916 Dec 29. MC for 2nd Lt. Leslie Keith Lockhart, R.F.A.Gazette
1918 Sep 28 Staff Lts., 1st Cl.—Lt. L. K. Lockhart, M.C., R.A., from 28th Sept. to 25th Oct. 1918.
1920 Oct 15 R.H. & R.F.A.—Lt. L. K. Lockhart, M.C., is seconded, whilst holding a Special Appointment.
1922 Dec 1. retires with a gratuity, but remains seconded under the Colonial Office.
1926 marriage to Freda Margaret Groves announced. He is not using a military rank
1928 Oct 1. He is restored to the establishment
1932 Jun 21 Staff College. He plays a lot of cricket for them and opens the batting. The matches are reported in the Times.
1934 Dec 21, graduates from Staff College
1935 Apr 1. gets a staff appointment
1936 Jul 12. Appointed Major, and remains seconded
1937 Jan 19 moves from Grade 3 GSO in Southern Command to GSO 3 in War Office.
1938 Jun 20. Promoted to GSO 2 at War Office in Directorate of Military Training
1939 - 1940 GSO 1 at War Office
1940 - 1942 Colonel General Staff British Army Staff Washington
1941 Jan 21 . Arrives Boston on SS Nerrissa. "Army Officer"
1942 Feb 18. Arrives New York, USA on SS Ville de Tamatave on a diplomatic passport.
1942 Jul/Aug Speaker at the Coast Artillery School "Colonel Leslie K. Lockhart of the British Armv and at present a member of the British Purchasing Commission at \Vashington, D. C ., was the second to appear on the program. His narration of the alternating Italian and German attacks on historic Valetta on the Island of Malta was well received.
1942 Aug 27 Left Honolulu, Hawaii on Pan American Airways Nc 14715 Philippine Clipper with destination San Francisco, California. His ultimate destination was the War Dept in Washington DC. He is described as a Colonel. He is on official business, and his stay in USA is "indefinite". He left mmainland for Honolulu on Aug 15.
1942 - 1943 Deputy Director of Royal Artillery, War Office
1944 Commanding Officer, Anti-Aircraft Brigade, North-West Europe
1945 Deputy General Officer Commanding Anti-Aircraft Units 21st Army Group, North-West Europe
1945 Commanding Officer 307th Brigade, North-West Europe
1946 New Year Honours. CBE Brigadier (temporary) Leslie Keith Lockhart, M.B.E., M.C. (13407), late Royal Regiment of Artillery.
1946 Jul Dear Editor: As I have now been appointed to a Brigade command in the UK, I would be much obliged if The Field Artillery Journal could be addressed to me there. I wish to add that I find your Journel of the greatest interest, and my copy is also always read by my staff and other officers of my Brigade. Brigadier L. K. Lockhart, CBE, MC. Hq. 30th A.A. Brigade. Newcastle-on-Tyne
1947 Nov 1 The undermentioned Brigs (Actg Maj -Gens ) to be temp Maj -Gens — L. K. Lockhart, C B E , M C (13407), late R A ,,to command 5th AA Group with acting rank of Major General.
1947 May 23. Legion of Merit, Degree of Commander. USA Decoration. Major-General Leslie Keith Lockhart, C.B.E., M.C. (13407), late Royal Regiment of Artillery. (Substituted for the announcement made in the London Gazette No. 37963, dated 23rd May, 1947.)
1949 Jun 9. CB in Birthday Honours list . Major General L K Lockhart, late RA. To be Ordinary Members of the Military Division of the Third Class, or Companions, of the said Most Honourable Order
1951 - 1952 District Officer Commanding East Anglian District
1953 The NZ Branch of the Boy Scouts Assn announced the appointment of Major-General L K Lockhart of Omata as Chief Commissioner for New Zealand.
1956 Sep 30 A Major expansion programme by the Boy Scouts' Association of New Zealand saw Taranaki uniformed membership rise from 212 to 281 and lay members from 68 to 96, the chief Scout commissioner, Major- General L. K. Lockhart, New Plymouth, reported.
1961 Lockhart Lodge was originally opened in 1961 and was capable of housing 48 people in rooms with four bunks. It was named for Major General L.K. Lockhart who, while chief commissioner, did much to develop Tatum. In later additions 34 rooms were added. It is now able to accommodate 64 people in either double, or single rooms, self-contained with laundry facilities.
1966 died, in New Zealand in New Plymouth