The Sparrowhawk Accipiter nisus.  Adult males have a slate grey back and white underparts, closely barred with orange. Their grey tail has 4-5 dark bars. Females are larger, with brown upperparts, a white stripe over the eye and dark barring underneath. They look heavier than the males. Their broad, rounded wings and long tail are adapted for flying between trunks and branches enabling them to weave in and out of trees at high speed. They never hover like kestrels.

The photo of the juvenile was taken just outside our kitchen window on top of our hedge by our youngest Declan (age 12)

Juvenile Sparrowhawk