The estimate from the authorised repairers was £7500. The front wing, bonnet, rear bumper, drivers rear wheel and I think roof may have been damaged. I believe the add 25% to the estimate to cover themselves. To be honest I wouldn't want the car back as it probably won't drive the same. I didn't expect the front bags to go off but the side curtain bags would have protected any passenger. Do they have detectors in the front seat to sense a passenger? I would be surprised. Still no harm done and a new car in a couple of weeks so can't grumble really. Thanks John