Filtering is legal, it's their duty to check its clear even if the bus was stopping or turning, they shouldn't have pulled out until they can see down the road, you've won this one just as long as you can stick it out.
(Andrew above couldn't help me apparently...yet I'm busy winning, he likes the sound of your claim though as it's an easy win.)
If you have an questions I'll give free advice based on my own experience, I've been hit by cars, buses, all sorts, hazards of riding all year, people don't even see me in a car, which I've bought just to have transport since my insurers suck, anyway:
I have taken part 36 offer before, I'd be a little hesitant with no blame mentioned, why are they offering to pay for you if you're at fault? Ignore your insurance company about financial implications if you don't accept, you're non fault tell them to piss off untill blame is established, if you have legal cover go for court, see what the other side suddenly do when faced with court, I've seen a case same situation as yours won 100% for the biker.
To be honest I don't even know why you've allowed it to go 14months, just opt for court now, my longest ever claim was 6months, my current one is at 3months and already im trying to go to court...why should my life be put on hold, if they got anything on me let's see it in court, because I know they aint got shit...