I was challenged for exact numbers - sorry for the slow reply, I've been "out" (and the end of RIAT party was excellent).
http://www.caa.co.uk/docs/33/cap780.pdf is my source, the CAA's most recent aviation safety review.
Worldwide, large fixed wing, gives 1 reportable (not fatal) accident per 2,500,000 hours, roughly, and about 1 fatal accident per 5,000,000 hours, coming down to about 1 per 10,000,000 hours in the EU. The UK is about aligned with the worldwide (not lower) EU rate. But, still tiny numbers.
Exact numbers for everybody else for 1997-2008:
Turboprops: 1 per 714,000 hrs
Business jets: 1 per 119,000 hrs
Public Transport Helicopters: 1 per 323,000 hrs (so sorry, I gave the wrong number earlier)
Public transport balloons: nil.
Light fixed wing:1 per 85,000 hrs
Small (under 2730kg) helicopters: 1 per 69,000 hrs
Private balloons: nil
Microlights: about 1 per 100,000 hrs (data not very clear)
Gliders: about 1 per 100,000hrs (data not very clear)
Gyroplanes: about 1 per 3000 hrs.
So a few differences in this particular report from the rough "from memory" figures I gave earlier, but the same general pattern.
Gliders are probably a bit worse than it appears, because a large proportion of their fatals are mid-airs, and one mid-air = one fatal accident, even if two aircraft were involved, in the way CAA do their statistics.
I agree that number of movements is arguably more relevant, but that data doesn't seem to be available.
And don't fly gyroplanes!
G