The initial Red Kite image is amazing, one of the best that I have seen taken in Ireland. As a result, the finer details of moult and wear are readily visible, enabling accurate ageing, though, as my own experience with ageing of Red Kite is limited, I concede that some of this may be incorrect.
So, to start, this bird is in obvious primary moult, and this means that it can't be one of this year's juveniles: the very pale iris, mainly yellowish bill and streaked underparts are also all features of older (adult-type) birds anyway. We are thus dealing with a bird in its second calendar year (i.e. born in 2009) or older. Now, I can't help but notice that the outer four (dark-tipped) primaries are retained older feathers, with a gap where the fifth primary should be. That said, it really interests me that the outermost primary is a lot more faded than the next three feathers: in Common Buzzard, during the first complete moult in a bird's second calendar year, the moult is very often incomplete, with a variable number of juvenile primaries not being replaced at all, and not moulted until the next complete moult, in the bird's third calendar year. If Red Kite has a similar moult strategy, and I don't see why it may not have, this would make this bird a 3rd calendar year, with three primaries remaining that it moulted in last year, and the outermost a juvenile feather that is almost two years old and will be replaced before too long.
Now I just need to study my copy of Forsman and see if my logical reasoning is flawed or not...