Re #1 of the last set of images, Simone asks - "1 Marsco with a snow cap (? TBC by David)"
I'm unfamiliar with these hills when seen from this direction (and this altitude) but I think Marsco is not one of them. Assuming that the rocky slopes in the lower right corner are on Sgurr na Stri, then they can only be Bla-bheinn (the nearer) and Garve-bheinn, with the craggy summit of Clach Glas just showing in the gap between them.
These mountains are alike in that they have somewhat smooth, somewhat vegetated west faces and steep east faces of naked rock, crags and cliffs. The shot from the drone is showing us the smooth west faces.