I had to change the front drivers side coil spring for this years MOT. I got the proper Sachs spring from eurocarparts and fitted no problem.
When I let it all down though, I noticed the other side (passenger) was sitting a little higher, but thought it was just settling at different rates and ignored it.
I have now changed the passenger spring for another Sachs spring and it has just made the problem worse, to the extent that it looks ridiculous! The springs are seated properly as far as I can tell. I would have said that the passenger side spring was the wrong one, except for the fact that I noticed the issue before I even changed it.
What else could be causing this? The only thing I have yet to double check is that the shock assembly is seated in the hub properly.
Cheers