Had something similar in March this year, was again on a 2 lane roundabout in the right hand lane going straight across, guy in a metro in the left hand lane also going straight across.... As we exited the roundabout he decided he was gonna try and go right, via the front wing of my car!! At the time he admitted liability and due to the low value of my car we agreed to not take things further, he's now claiming that ive cut him up!!

Hope u get sorted out!!