This is a rather poor picture of a Common crane in Norfolk. They do live wild in Norfolk (read the whole story of the increasing but still small numbers there since the seventies) but this one is at Pensthorpe so presumably captive in at least some sense. It's standing on one leg and stretching a wing which is why it looks a bit odd!
Update: According to Blackbird in the comments, this is actually a Demoiselle crane! And I think she's absolutely right, which just shows how careful you have to be when identifying things you're unfamiliar with.
I think you’ve got a Demoiselle Crane there!
http://en.wikipedia.org/wiki/Demoiselle_Crane
I think you’re right – thanks. I was completely unfamiliar with Cranes before this post and was caught out by that. Post updated!