I could accept that they were guilty of the ABH of the other fellow on the basis of calling in the boys, but I don’t believe there was intent to make it more serious than a push and a shove to scare them off (if the mob call a hit there is a clear intent to kill).
Either way there was a clear GBH of the guy left bloodied and possibly not on the guy with a broken neck (do broken bones count as GBH?), so odd they plead guilty to GBH to one and not the other.
Push and shove they threw them down a 14ft embankment and left them for dead for all they knew given they were unconscious.
It's pretty reasonable toforsee throwing somone down a 14ft drop in the cou try side then abandoning them is likley to lead to severe risk