Alright, so, further to my post about wheel bearings, I've replaced the front nearside CV joint - what I thought was the source of the knocking sound from that area when turning and driving (only noticeable at very low speed for example when reversing and turning out of my driveway). Didn't make any difference. Someone has suggested front nearside droplink, but my experience of worn drop links is more of a lighter tapping noise when driving. What else could it be? Any suggestions?