Song Thrush welcome. Raptor.... perhaps not

Middleton Nature Reserve.
It was very nice on arrival this morning to be welcomed by a Song Thrush in full song. Also the regularly reported "white" Blackbird was showing well near the entrance. The yellow bill and a few black feathers, clearly identifying it as a male.
A large unidentified raptor was flying around.  Larger than a peregrine with broader wings and obvious fingers. There was no sign of a falconer, and no jesses, so presumably this is an escapee rather than a bird being worked.
To cap a busy visit, three additional adult and one immature mute swan, had disrupted the normal status quo, resulting in several territorial battles.

Mute Swan 7 adult, 5 immature
Moorhen 2
Coot 2
Pochard (male) 1
Gadwall 7
Mallard 6
Teal 6
Little Egret 1
Common Snipe 1
Jack Snipe 1
Cetti's Warbler 1 (one burst of song).
MD