Yeah, but if you look at the clauses
(2) For the purposes of subsection (1) a person drives a motor vehicle
culpably if he drives the motor vehicle-
(a) recklessly, that is to say, if he consciously and unjustifiably
disregards a substantial risk that the death of another person or the
infliction of grievous bodily harm upon another person may result from
his driving; or
(b) negligently, that is to say, if he fails unjustifiably and to a gross
degree to observe the standard of care which a reasonable man would
have observed in all the circumstances of the case; or
(c) whilst under the influence of alcohol to such an extent as to be
incapable of having proper control of the motor vehicle; or
(d) whilst under the influence of a drug to such an extent as to be
incapable of having proper control of the motor vehicle.
That seems to indicate that there is a distinction, because it goes on to define what 'culpable driving' is, which does not, as it describes, always equal death, but can just be a terrible injury.