identify please

[sleblique]

my grand uncle was in the Raf and had this in his collection, can anyone please tell me what it is,
thank you.

[DrPMC]

This isn't a British official decoration, military or civil.

It looks relatively newish - perhaps it was an award from some other organisation that your uncle belonged to? A better and more detailed photo of the decoration, and its reverse might give a clue. Incidentally, the cross of the decoration is of the 'botonee' type.

[sleblique]

The reverse is blank apart from one rivet holding the shield to the cross,
He did work with French and Belgian resistance. (Groups unknown).