For comparison in another field of leisure activity there are two fatal ski accidents prosecutions - basically skiing in a totally reckless way.
One is in 2001 in the USA and the other in 2009 in Austria
Both were found guilty.
The Austria charge was one of involuntary manslaughter and in the USA reckless manslaughter - terms which I think we do not use in the UK.
Nearest equivalent charge I know of in the UK is in fatal car accidents where the charge if applied/prosecuted is a very motoring related specific one of causing death by dangerous driving.