As Genghis says, the CAA do have TT data (at least TT between medicals) but they don't have data on the type of flying people do.
Pilot A could do 50hrs/year flying between Goodwood and Beachy Head on sunny Sundays (as indeed great many do). Pilot B could do 50hrs on business-type trips, doing DIY approaches into Welshpool
Whether A or B is more likely to get killed depends on
- how careful they are (B is IMHO likely to be more careful, perhaps?)
- how well maintained (A is likely to be a renter and thus flying a less well maintained plane, but since others fly that plane most of its hours,
they are more likely to have an engine failure)
- weather (B will be more at risk)
- equipment (B is likely to have better kit, e.g. GPWS)
Yes I do long trips and 100-150hrs/year so I should be more likely to get killed (especially with
this kind of stuff, although to be fair my time actually crossing the Alps is only 1-2% of my TT) but I am quite picky about avoiding hazardous high altitude weather, and I fly IFR so don't scud run; also maintenance is money-no-object.
So one would need to do a pretty detailed flying pattern survey to make sense of what really makes people crash.