Death of driver struck by his own HGV

i had palms fitted on my last job, as i was pulling dutch trailers, i allways put a bit of spit on them before joining them, and carried a spare couple of flanges in case there was a split one on the trailer. When i had 113-143 the cab-end of the airlines (with palms on the other end, pulling dutch trailers again) had taps on, which was handy if you split an air-line, but i dont think you can get away with doing that nowadays