Hi,
All sorted in the end. I re-tightened both the LCA hub end bolts, although they were already tight, and then replaced the Drop links.
What I also noticed is the front and mid undertrays and wheel arch liners both had quite a few bolt, push clips missing which could be causing a plastic on plastic knock or rattle. I just used foam pads to fill the gaps.
End results is no knocking!!
but I would suggest checking all the underbody plastic trims.