This is an American Robin, a different bird to the European Robin although named after it because of the red markings.
I happened on it during my walk last weekend. It was a surprisingly brave bird and didn’t immediately fly away when I came blundering onto the scene. I wasn’t incredibly close, but enough so that I could use my telephoto lens to to get a halfway decent shot.
I think I misjudged the F stop though. Because although it focussed correctly the bird is not as sharply in focus as I would have liked. Of course a bigger zoom would have been a plus too, but that’s expensive… stopping down is free.