Nick,
BCAR 29 required the windscreen to withstand a 1.8 kg bird.
BCAR Part G which applied to the S76 many years ago required a 2 lb bird (0.9 kg).
So the latest standards in FAR/JAR 29 of a 1 kg bird is not a big step forward and is in fact a big backward step for the UK.
Have you tested the S92's windscreen to destruction? Will it take much more than 1 kg?
g33