The letters l.a.c. stand for LEADING AIR CRAFTSMAN which in the RAF is equivailant to a senior PRIVATE or the rank just before a serviceman receives sleeve rank.The insignia for a LAC is a two bladed propeller worn between the elbow and shoulder.His organization is the RAFVR.
In this rank category it is unlikely that he was a pilot.Commonwealth Forces, unlike the USA, DID have a vast cadre of pilots who were Sergeants, but the pilot brevet was not conferred below the rank of Sgt.It is more probable that he was part of a multi-member crew.The date is curious as hostilities had ceased on 2SEP45.So while he was still on active service it can not be properly classified as a combat casualty.
Here is his citation as found at CWGC:
LEONARD JOHN MASTERS
Leading Aircraftman 1128519 Royal Air Force Volunteer Reserve
who died on Sunday 11 November 1945 .
Cemetery: CHRISTIANSBORG WAR CEMETERY Ghana Grave or Reference Panel Number: Plot 1. Row B. Grave 3. Location: Christiansborg, one of the main suburbs of Accra, is 3 kilometres east of the city on the main coast road. Christiansborg War Cemetery is on Castle Road, near the State Building, Accra International Conference Centre and Black Star Square.
Historical Information: During the Second World War, Accra airport and other airfields in the Gold Coast and Nigeria, were of major importance to the Atlantic Ferry - a process whereby much needed aircraft were flown by American crews from factories in America, across the South Atlantic, to West Africa. At Accra, the aircraft were handed over to the Royal Air Force, fitted and tested after their long flight, then flown onwards to the Desert Forces in North Africa. A separate service run by the South African Air Force flew bombers south to the Cape. No. 37 (Accra) Military Hospital was established at Accra during the war-time expansion of the Royal West African Frontier Force. Accra also contributed six Companies to the Gold Coast Home Guard, created in 1940 and disbanded in 1944. CHRISTIANSBORG WAR CEMETERY was constructed in 1941 and was maintained by the Royal Engineers until taken over by the Commission towards the end of 1949. Graves from the following cemeteries have since been brought into this cemetery : Takoradi African Public Cemetery - 82 burials. Tamale African Cemetery - 43 burials. Tamale European Cemetery - 5 burials. There are now 416 Commonwealth burials of the Second World War in Christianborg War Cemetery, one of them unidentified. There are also three war graves of other nationalities and 18 non world war burials. The CHRISTIANSBORG MEMORIAL, which forms the entrance to the cemetery, commemorates over 450 men of Gold Coast enlistment who died in West African territory during the Second World War, whose graves are unknown or are so situated that permanent maintenance is not possible.
The number is his sequential service number.The abbreviation for the unit could be a combination of words as found in the above historical information.