this is certainly a Black Kite. I am not exactly sure if it is Black-eared Kite ie definite lineatus and that we can rule out eastern migrans but it is showing some features of the former taxa (and that, of course, is what most winter UAE kites appear to be). I don't have any books to hand here in work but will have a look tonight when I get home.
AD 253 (253 Eurasian Crag Martin, 14th April 2013, 254 ye gods - RIVER WARBLER, 8th May 2013)
2012 Final total - 196 (109%)
Final addition – Eurasian Wigeon (5th December)
yes... you are correct ... it has features of both m.lineatus and m.migrans but i think it tends to carry more lineatus than migrans features (raptors of the world)