The rock hopping type is correct...airbags are designed to activate only when the impact comes in at a predetermined force from a certain direction - usually you hit something head on or for side airbags, you have an impact which comes into the side.
The impact the car would have detected here would actually have been a roll and unless the airbags are designed to protect you in such a crash, like the curtain bags in T5's for instance ( don't ask how I know this, but it wasn't me
), then they will not activate for fear of actually causing injury to the occupants.
Now to the car..... that is one very well designed passenger cell... once you get the payoff, go and buy her another one.
As regards the lack of crash barriers, again I agree with Paul. To make a successful bid for compensation here, you would need to provethat the Council / Highways Authority were aware that there was a substantial risk of this type of accident occurring at this site and that they then went on to ignore that risk - mission impossible I think but with todays state of litigation, you'd be daft not to try!
Training / confidence building - try these guys, they are good.....
Ride Drive They run a number of courses, one of which will more than likely suit, or they should be able to work something out to deal with the specific needs you have.
I'm not personally connected with the company, however I know a few of their Instructors, many of whom instruct people like me whe I took my Police Advanced car course.
Not the cheapest, but I think one of the best.
Hope that all goes well on the recovery / getting over the shock front.
Cheers
Andy