The weather was good as was the visibility at the junction so it can only be that the driver failed to look or looked but didn't see. I tend to struggle to tell when drivers are going to do that rather then come to a stop. I to favour a quick beep if in doubt (and when I see cars looking to emerge from a junction with a line of traffic going the other way) but in this case I thought it had stopped.
My best advice is *never* assume that they're going to a) see you or b) stop for you. Even if they appear to be looking right at you, it doesn't mean they've noticed you. Try to adjust your speed such that, if they don't stop, you're not going to be in the same place as them when they cross onto the roundabout.
It's nice to see all the sound advice- I follow the watch the front wheels one.Yet with all this talk of adjusting speed, planning escape routes and the rest not one person has mentioned the horn-Doesn't matter if it's a junction or roundabout, You see wheels turning the very first thing you do is push that motherfuckin horn!
I've been advised by Police riders and IAM riders to NOT look at the drivers or their eyes for recognition - BUT, watch the front & the wheels of the vehicle; if the vehicle doesn't appear to slowing, then assume they haven't seen you and put the appropriate escape route in your mind.Looking at the front wheels is the easiest way to avoid cars pulling out from parking spaces in front of you (their wheels will be turned to the right, and watch for any signs of movement), or to avoid cars pulling out from junctions in front of you - the moment the wheels start to move you should accept they haven't seen you (even if they're looking directly at you) and take avoiding action. From experience, THIS WORKS.
I know round abouts were something I used to get comments on (going to slowly coming up to them when it was easy to see it was clear) and something I didn't like post CBT It's been very useful to read this thread