I spotted this little guy looking at me earlier.
Couldn't get close enough to get a decent zoomed in shot on my phone so it's a bit of a rubbish photo I'm afraid. In the three just to the lower left of the middle.
http://tinypic.com/r/eja1io/5
A longer plumper bodied bird with brown speckled feathers on the front and darker brown wings.
It looked almost owl like, the tiny head and the way it just kept looking slowly from side to front to side or maybe, with it being daylight and near a city a young bird of prey, there have been kestrels nesting in the city centre though you can hear them a mile off and tend to stay up high.
I was watching him for about 10 minutes then he flew off, quite a large wingspan, looked maybe more bird of prey like then, though not a huge bird.