If that is fretless, then ole Bill is better than I thought.
Actually, I have doubts whether this is Wyman at all on the track. He usually sounds a lot more concentrated and intentional when he plays something. This sounds like a doped down Richards to me. Somehow, I'd expect Wyman to know already what he is going to do before he sets about doing so. Nor would I expect him to leave such a messy track for the final version. It's just not him.
Uwe