I had also been puzzling over these pictures. I had assumed all shots were of the same bird, but looking more closely, it looks like the tarsi on the bird in flight are not feathered whereas they are on the perched bird. Are they the same bird Paul, or could the first bird actually be a Buzzard as Eric suggested. The plumage of the bird in flight also looks to me more like a buzzard than an eagle.
The perched bird does look more like a Steppe Eagle, with moderately large bill (too large for a buzzard), obvious gape line and feathered tarsi.