There really are astonishingly few with no other vehicle involved.
I had a very cynical* thought about that, last night:
The nearest fatality to me says:
15/4/07 Sunday 16:25
Female Going ahead left-hand bend
No other vehicle
A rider's eye view of the site,
here.Now, I cycle down there fairly regularly, and while you can get up a bit of speed down that hill, I really can't think of any way that you could crash hard enough to be killed there without some sort of outside assistance**. And it's opposite the entrance to the golf course.
Hit-and-run?
*I've obviously been hanging around here too long!
**Perhaps a major mechanical would do it, but what are the odds?