I had a work colleague who used to lose front screens on his Vectra. After a lot of investigation it appears that it had fallen off the transporter, been repaired but was still twisted.

Unless of coure, any of your neighbours have recently bought catapults, air rifles or the like!.

Thanks. It was under cover at the time in a very remote farm building. I searched for obvious projectiles and nothing to be found. I really think that there's a fault with the glass though of course, I can't prove it!! At fifty pounds excess every time it's beginning to add up!