Really easy to replace the side I've done. The other side...... tricky, as its cam sprockets off. I only had a new cambelt fitted about 1000 miles ago so I wont be doing that side for a long time.
I actually fell upon this doing a search to replace cam cover gaskets.
https://www.matthewsvolvosite.com/fo...hp?f=1&t=50752
It described with pictures the exact location of my oil leak/drips (or at least some of them....). I still think the cam cover is leaking as well.
Once I've got the other replaced I shall give it a de-grease and see whats happening.