Finally, under the right tombstone ... 95 years later!!
2 Lt. Philip Frederick Cormack, Killed in Action 27.10.1918
In 2009, a local Belgian researcher reported to the Commonwealth War Graves Commission that there was a P. F. Cormack buried in the French military cemetery at Machelen-Zulte (Belgium). An investigation was started, and since this name appears nowhere in the French lists - except on the list of the cemetery itself – it was concluded that this was indeed the British pilot.
On Thursday, December 5th 2013, the French cross was replaced by a British headstone, and P. F. Cormack is therefore no longer missing. At the entrance to the cemetery is now the well-known CWGC green plate, because of this "Commonwealth War Grave".