The only positive to take away from the report is that they were transported by land ambulance, even though the air ambulance was there. This suggests that their injuries were not life threatening - I hope it is true.
I know that road: it is a bit of a challenge, but encourages one to make good progress. As we have seen in reports of other M3W accidents, when the back end goes you become a passenger and what happens is down to luck.
Fingers for Bill and John's speedy recovery.