Tagged Buzzard sighting

Good Afternoon,

Just wondering if anyone can help me find out a bit about a Buzzard I happened to catch on camera whilst out this morning, it was only after I got home and reviewed the photo's that I noticed it appears to have quite a large white tag on the upper right wing with the number 91 on it. 

I've watched the Buzzards in our local area for many years now, there's quite a lot of them but they are very difficult to catch on camera. I was quite surprised to see this one was tagged and would love to find out more about it, i.e where and when it was tagged and details of the bird itself.