This from the BTO website:
‘One of our Goshawks began automatically reporting its position soon after leaving its nest in Thetford Forest on 23 July 2016. Over the following few weeks it visited Narborough, Roydon Common and the Sandringham area. The bird was reported to BTO by Sandringham Estate as having been found dead on 9 August, and the tag was returned to the BTO intact. The bird may have died from natural causes, but currently the circumstances surrounding this bird’s death remain unclear. BTO has sought further details in the hope of clarifying how this bird died.‘
The BTO’s Patron is married to the Queen.