Yes, most deaths definitely from HGVs. The "bus error, brain dumped" association maybe came from this: http://www.telegraph.co.uk/men/the-filter/11036188/Angry-bus...

Interestingly enough, over here (Helsinki) we have lots of segregated bike/pedestrian paths, and many cycling activists want to remove them from inner city and have bicycles on the street among other vehicles, "to be equal".

Personally, I think they're nuts. The separate paths are good, even if we still have to watch out in intersections.