MKIV Golf TDI Knocking Noise nearside rear quarter/wheel area

[golftim]

Morning all. On the upside, the sun is shining. Hurrah
On the downside, my golf is playing up. Arrrgh .

Quick summary:
Going over bumps in the road (and particularly larger bumps/potholes) there is a significant knocking sound from my rear nearside wheel area. My initial thoughts have been worn top mount, radius arm or suspension bushes - any thoughts?

In addition, I checked my tyres last week and noticed that My offside tyre has about 6mm tread left on it, whilst my nearside tyre is almost bald on the nearside of the tyre and down to about 3mm on the offside of the tyre.

It's worth noting that when I bought the car 12 months ago, the tyre wear was even, and this knocking noise started shortly after buying the car, but has got progressively worse.

Advice/diagnosis would be greatly appreciated! Would normally get underneath and have a poke about myself but have done my back in at the mo so hoping you guys can help!

[Primo1000]

Could be anti-roll bar bushes need replacing.