Small to medium sized bird of prey, flew onto window ledge then fence post (as photographed)
No interactions present.
There are several ways you can tell a Sparrowhawk from a falcon (Kestrel, Merlin) when you see it this well, but one of the easiest for beginners is the colour of the eye. Hawks have yellow eyes, falcons always dark eyes.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
This is a female sparrowhawk.
They are larger than the males and do not have quite such bold colours on the head and back.
The irregularly barred underparts and the buff edges to the feathers on the wing and back make this a juvenile. It may be a female, but it can be difficult to judge at this age as the plumage is similar for the sexes. Size can be hard to judge, too, on a lone bird.
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I would agree with ophrys that this is a juvenile bird and also there does appear to be a slight rufous tinge to the barring on the breast, which may indicate that this is a juvenile male.
The rufous tinge to the barring on the breast might indicate that this is a juvenile male, but it is not that unusual for females (of any age?) to have some rufous barring on the breast.
Lat/Lng: 52.04732, -3.74053
OS grid ref: SN807401