[Etienne]

Thanks for that Steven........Up to this stage my guess plus previous input boils down to the following.
This looks like the "civil" version (see the black curve on the nose and black area on the wing) therefore the whole body could have been pale grey.
Upon arrival in North Africa 79 streaks were added fairly heavily over the top and sides , and finally streaks of 80 over this. The rudder shows two colours (light grey +79) while the fin and the rest of the fuselage and wings have the third colour (80) added. Could the fuselage band have been dark blue?
..............Questions,........Questions.

Cheers!