Aw shucks, didn't do anything special, just a bit of Googling, but nice to be appreciated
One thing I'm a little puzzled over is the fact that the crash site was near Bochum Woods (Stadtvald?) yet it says he is on the Runnymede Memorial. I have asked elsewhere and whilst there appear to be no local records as to any burial, it might be that his body was repatriated to Greece after the War by his family or the Greek government.
It may be worth contacting the CWGC as to whether they have any info on why a Runnymede commemoration. So close to the end of the War, I would have expected a MACR or similar report.