I work for an insurance company, now I've realised there's not much difference to the rise of premium between a fault and non fault claim.
And the minute you make a claim, it will go down as fault until it's resolved, and if you're with one of the 'cheaper' insurers (top of the list on comparison sites etc) keep an eye on the claim on your policy as they're renowned for not changing a claim from fault to non fault once it's resolved!
Plus don't go through insurance for windscreen claims, it won't affect your NCD, but will still go down as a claim on your policy!