I'll just ask some questions here to clear it up. One, in fact. There is a main difference between CB and RLB, which is in the name. Were its legs feathered to the talons? It is called rough-legged for a reason. Birds like that have feathered legs. Take a look at the image I have attached. If it had legs as feathered as that, pay attention to the area circled in red, everyone here is wrong, and it is a RLB 100%. If that area is not feathered, it is 100% CB. It is that part of the body, not the colour, which identifies the bird- I have seen aremarkably buzzard-like RLB near Waterbeach quite recently. Did you manage to see that? Because from what I see it does have very feathered legs, but that can just be lost in the pixel soup. Cannot see any yellow skin on the legs, though. Looks like a RLB to me, but I need more information to suggest what it is.
F.Y.I, Prestj and bernie b, you are being extremely and exceedingly disrespectful. I was never insulted for images about a thousand times worse. Don't know what this is on about.
See image below- was this close to Wells, perhaps? And if you look carefully it looks like one and the same bird.