Just popped out for a quick bike ride today and saw this.
Sorry abut the photo - compact zoom but with little notice as the bird whizzed past so quickly so only the one picture.
It was a light browny colour and much larger than a Kestrel and didn't 'hover' like a Kestrel, instead it swooped up and down in the wind (quite graceful) over the fields.
I only caught this snap because I stopped as I heard another bird's alarm call and thought something must be about.
Any help appreciated - and I'm sure you guys will have an answer even though you can't see the blimmin' bird's face!