Hi
Until the experts reply,
I am no expert but think the tail too short for sparrow hawk.
but have a look through this forums own bird identification, may give you some pointers to look for when flying into garden
https://www.rspb.org.uk/birds-and-wildlife/a-z
Yes, the shape is buzzard. Everything says buzzard, but as it's often in the garden, are there any other photos?