XF Rear Suspension

[KevNoble]

Rear Tyre Wear
About a year ago, the rear left tyre was severely worn on the inside edge. I had the wheel alignment checked and adjusted, replaced the tyre and now it is starting to wear much more on the inside edge again. I therefore assume some of the lower bushes are worn again (see previous posts). The car has now done 196,000 miles and still runs perfectly. The question is, should I just replace the inner bushes again, or replace all 3, or the whole lower wishbone? Should I also replace the upper wishbone too and the tie rods? I also intend to replace the ARB drop links whilst I am it.