Could someone identify this bird for me please

I have been told that there was a Red Kite in the area, which I have to admit, was taken with a pinch of salt, as I live in Watford, which is not exactly the heart of the countryside. However, after a flash storm I saw this bird taking time to dry out a bit before taking to the wing. I managed a couple of pictures which were very rushed and through the glass. Is it a juvenile Kite? I really have no idea. Thanks so much. Picture attached (I hope!)