have you
primary position????
I was in the same spot I use every other day for over a year and never had any problems at all on the roundabout until now!! I was close to the outside (left) of the lane as it gives me the good old ''eyeball the driver'' position while still claiming my space on the road.
think the guy just wasn't paying attention or he had a blind spot.......either way I feel I was in the right in terms of clothing, lights and road position
have you thought of taking the middle of the lane. You may be right that he wasn't looking, certainly not for bikes on the outside. He probably checked for cars on approach and then diverted his view as he came within a few yards of the roundabout to where he was going, so by placing yourself in the middle you would have been where a car would be. Not forgetting that an entrance to a roundabout places there car at a slight angle, this placing a cyclist on the outside of a lane in the blind spot (directly in line with the A pillar of the car). Further when human eyes scan, they take snapshots of certain points, and the brain fills in the gaps with what the human expects to see (so if they are not expecting a cyclist, and the cyclist is within the gap, the brain won't see it).
so we have a driver who had scanned the roundabout on approach, checking the middle of the lane for cars and the placed he is intends to go, and the car at an angle where the cyclist is obscured by the A pillar because he's on the outside of the lane.
I think you would be better in the middle of the lane where a car would be.