tightwad, firstly I've been ridning 5'000 to 10'000 miles a year for around 15 years now, I think my experience of the UK roads is rather good. I, like coruskate, read your first post & would say that there was a collective failure between you & the mini-buss driver to show proper observation & risk anticipation skills. You were filtering on the blind side of a car & the mini-bus driver wasn't expecting a filtering cyclist on the nearside of the car thus didn't see you. You failed to filter with appropriate caution considering there was a (near) stationary vehicle in front of you. The result of 2 people not paying proper attention to the road around them was an accident, completely avoidable if one or other of the parties was paying full attention to the on-road scenario. In short you were partially, but certainly not totally, to blame for the incident.
I've seen this happen before, I've even had another cyclist squeeze between me & a van to carry on down the nearside only to watch them go over the bonnet of a car, which I'd already worked out was there. Please note I could not see the car turning right, but due the behaviour of the van driver knew the car was trying to turn right!