Mk1 wobble

[Msc1]

Hi, hoping someone can help. My 1.6 petrol facelift has developed a loud wobble when driving over uneven surfaces (silent on motorway and smooth surfaces) from the passenger side rear. Tried swapping wheels around, changing all 4 drop links (which improved it for a week before returning) , and the lower rear trailing arms, front and rear brakes but still it's there and driving me mad. Any idea what this could be? Springs and struts appear to be doing thier job but not ruling anything. 

Still have upper control arms, roll bar bushings, upper trailing arms, and control arms to do but hoping someone has come across this before I spend anymore time and money! Thanks in advance. 

[F0CUE]

I would say shocks. Check for leaks.

[Msc1]

Ta. Nothing untoward visually in them, car seems and sounds fine going over speed bumps, it's just minor pot holes that really brings it out. Feels a little unstable in windy conditions on the motorway at 70mph which I know also points at the struts. 

Always makes me laugh when I read 'had my Focus for 150,000 miles and only changed a lightbulb'. Mines on 80,000, got it at 50,000 and changed about 50% of it so far 😭