The following is posted in the 'normal' Forum here:
http://www.briskoda.net/forums/topic/325880-those-lk-silver-mirror-covers/
But as you're here already, this is what it says:
MIRROR COVER REMOVAL
1. Motor the mirror fully down (ie looking at the floor)
2. I eased the mirror assembly forwards (ie opposite way to how the electrics fold them) to make it easier to work on them
3. Carefully, with a flat blade screwdriver (or two at the same time if you can) release the clips that