I know the feeling having just dented your pride and joy, I decided to see how motorway barriers work about 5 weeks ago...
Mines an N reg williams 3, I notice yours is N reg aswell so thats a good sign. I got mine back on Thursday after 2900 quids worth of repairs... heres my damage list
bonnet, wing, 2 headlights, both bumpers, tailgate, rear light cluster, indicator, front cross member....
Yours doenst look anything like as extensive as that so Id say fingers crossed they will repair it.
Search around for the best quote you can get to keep the danger of them writing it off to a minimum.
I was thinking about getting some parts of here already painted in the right colour to keep the cost down... its an option if you are close to the writing off limit..
Good luck