UKNB has been on tour to Norfolk, so has come back with lots of good stuff to share with you all. First off, a picture of what I think this is a Hobby, but I'm not sure as it could just be a more common Kestrel. There's no obvious black bar across the end of the tail which confuses me a bit in either case. The head could conceivably be white with a black mask, which is why I'm going for Hobby. Having looked it up it seems that its manner of flying would have given it away, but I don't recall whether it was a "languid flight with occasional flutters" which would indicate Hobby. Could it even be something else entirely?

Are you a wizard at identifying falcons? Please enlighten me if so!