Following work I visited the Watton Brook Valley hoping for migrants, however, none were visible on this very short visit.
Walking back to the car I glanced east and saw a large Goshawk (prob. female) circling over woodland, it remained in view for a few minutes before diving out of view behind trees. A Buzzard was soaring close to the Goshawk and offered good comparisons between the species. The Goshawk was as large as the Buzzard. When seen from behind the Goshawk showed extensive under-tail coverts.
I have found throughout the years that August and September are good months for seeing Goshawks, most sightings are of wandering youngsters and they do turn up anywhere at this time. Last autumn a young Goshawk was seen from my garden in Watton.