The bus company will try every trick in the book to try and get out of it. I ended up with permanant damage to my neck because of it and only got a grand for it whereas other people get 4k for temp strain. Deff think 3k should cover it but getting them to pay is going to be a problem. He should have given way to the traffic on the right (your car) so he is in the wrong but quite a lot of accidents on round-a-bouts end up at 50/50 which is still seen as a claim.