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I just found this little video clip which refers to the identification you have given:
I realise that this is not conclusive evidence as a backup, but is this the one?
In the same place I found a series of photos which referred to the chrysolina herbacea but the beetle seemed to have much more of a burnished bronze effect than the one in your image.
I see the common name Mint Beetle.
So I am going to agree with your identification.
Lat/Lng: 50.9558, 5.4084