Not wanting to sound like a wet blanket, road markings permitted, its upto any driver to ensure its safe to change lanes?
You really need additional pics of how a driver, whilst in lane 2 as your other half was, is able to leave that lane onto their new road. Is there a 'snail' type set of markings from her lane onto lane 2 of the new road? You really need pics of that too.
I would still think that the ins co's will settle 50/50 unless you really bolster your highway code/road markings/carefull and considerate driver argument.... 
Not having been up there for a while, i'm not sure if there are any dashes indicating lanes on the roundabout.
Guess I will be doing that this weekend.

I understand the before/after 12 o'clock rule as do most people.
However given the road markings preceeding the roundabout, the directions are pretty clear.
Rena has stipulated to me that she checked her mirror, checked over her shoulder, started to indicate, then bang! The car hit her.
If I had no personal link to this, and saw the pics on here, I would concentrate on the following.
Clear exit markings on the roadsign.
The 12 o'clock rule/mantra.
The very clear roadmarkings.
The fact he intended to pass on the left on a roundabout.
Again, pretty clear imho.
P.S.
Cheers for the pic Doug.
