This afternoon I tried photographing harriers in flight again, using the suggestions from forum members in response to my last post. I used my vehicle as a "blind" and selected a different location from the last post.
Canon EOS 7D, EF300mm f/2.8L IS USM, 1.4x TC, Gitzo GT3531 Mountaineer tripod, Gitzo GH3780QR ballhead
I prefer this pose to the previous straight on one, and the band of clouds adds a lot of interest to the background.
Interesting rim lighting effect caused by the angle of light. That angle has also left the near side in shadow.
If you haven't already, it would be worth some subtle lightening of the shaded areas, esp. the eye.
It has to be very subtle so as not to look artificial, but I think there is some room to work there.