Little bird in rose bush.

We were watching a Oyster Catcher chasing another bird, not sure if it was the young seagull or a hawk (it was quite big & brownish). I rushed off to get the camera, and also had to change to the big lens. By the time I got back, the fight was all over, and this was the only bird around. Not sure if it is a young Thrush or not.
I had seen 2 Oyster Catchers flying after the same brown bird a few days ago. both times the Oyster Catchers were making a real racket - that was what had got our attention today.