Rough-legged Buzzard

I caught up with the Rough-legged Buzzard on the Lincs Wolds yesterday; it was always distant hence the very small record image above (first and last images); the bird is certainly older than a juvenile ie it is either an adult or a 2cy bird; there appears to be some contrast in the secondaries but not a lot but the largish and fairly solid belly patch may also suggest that it is a 2cy bird rather than a full adult; the solid carpal patches, pale head and streaked upper breast, tail with one solid bar and a faint inner bar, fairly uniform underwing coverts all seem to point towards it being a female but in direct side by side comparison with a pair of Common Buzzards it did not seem all that big; maybe closer views and pictures may elucidate; also here a couple of adult / 2cy males from Finland / Norway