I was going to put in for a new screen as I have a recent large chip appear thanks to a skip lorry, anyway I didn't bother as my insurance company said it may only be the windscreen excess to pay but it was still a claim and that would effect next years premium even with a protected NCB.
a few years back I had a chip fixed by autoglass and it cost £10 , I found out the following year that it was noted as a claim and they were increasing my premium by £50 because of it....
I wouldn't have claimed to be honest .