Larskristel
Maybe I lost something in the translation
but your link is to:-
Name: DEFFONTAINE, CHRISTIAN GEORGES AUGUSTE J.
Initials: C G A J
Nationality: United Kingdom
Rank: Pilot Officer
Regiment/Service: Royal Air Force Volunteer Reserve
Age: 26
Date of Death: 27/02/1942
Service No: 87682
Additional information: Chevalier de L'ordre Leopold avec Palme, Croix de Guerre avec Palme. Son of Lieutenant-General Georges Francois Auguste Deffontaine and Lucienne Virginie Jeanne Marie Deffontaine.
Casualty Type: Commonwealth War Dead
Grave/Memorial Reference: Panel 69.
Memorial: RUNNYMEDE MEMORIAL
Whereas the headstone is for
Name: PAVEY, ALAN FRANCIS
Initials: A F
Nationality: United Kingdom
Rank: Flight Lieutenant (Pilot)
Regiment/Service: Royal Air Force Volunteer Reserve
Unit Text: 122 Sqdn.
Age: 24
Date of Death: 27/07/1944
Service No: 119252
Awards: D F C
Additional information: Son of Lt.-Col. Samuel Pavey, M.C., and Eva Mary Pavey, of Hove Sussex; husband of Beatrice Pavey, of Barnet, Hertford.
Casualty Type: Commonwealth War Dead
Cemetery: LES PREAUX CHURCHYARD
which is I presume the 122 Squadron connection..... but is there something we are supposed to know about Deffontaine?
In 1944 122 Squadron were flying Mustang III fighter bombers in support of the Normandy invasion and drive through France.
It would appear that F/O Pavey may have been shot down during a ground attack, presumably an airfield or other target of opportunity near where he crashed.
His is the only CWGC grave in the churchyard, which usually infers that the village may have "adopted" him, which I do hope is the case.
Pierre Vandervelden has an extensive website of most (if not all) of the CWGC cemeteries in France and Belgium for both WW1 and WW2, well worth bookmarking for future rfererence.
The relevant page is here:-
http://www.inmemories.com/Cemeteries/lespreaux.htm
The Squadron code was MT, but I don't have the Mustang serial or individual letter.
Hope that helps to some degree