I had just put the camera trap out ( it is out at the time of writing this, in the spot where we caught some deer) and was walking home along the canal when I saw some feathers. My first thought was buzzard but I knew it could have been a tawny owl as well.
Here are the three feathers - but they haven't been lost naturally as they are attached to flesh!
What bird did these feathers belong to?
Like I said earlier I reckon these are buzzard feathers. The only other bird would be a tawny owl. There are plenty of buzzards in the area but there are still a few owls. Here is a comparison between the feathers.

Tawny owl feather

Buzzard feathers
Both are quite similar and those are the best images I could find but the feathers here could be from different areas of the bird hence them looking different to the ones I have. But like I said I am sure it was a buzzard.
What happened?
My guess is that the bird got in a fight with another animal and a little chunk of it got torn off. I reckon it was earlier this morning before people started walking along the canal as there was still blood on the end of the feather. It may have been resting but then got attacked by another animal. It then flew off still losing it's feathers since it was injured.
Suspects
My main suspect is a red fox.
They have been known to attack buzzards mainly to scare them off.

Pictures taken by me :-)
The fox probably bit into the buzzard, not killing it but injuring it and scaring it off.
Also the other week I found lots of pigeon feathers together in the woods. I think a fox got to that too.
So that's what I think happened to the bird which these feathers belong to. What do you think the animals involved in this fight were? And do you want to see my entire feather collection?
Please say what you think in the comments :-)