The final Fairfax poll before the last election had National on 54%.
At 6.5% off, that was the least accurate of the bunch.
The drop from that poll to now in the Fairfax is 4.5%. If you translate that to the actual starting point, National’s down to around 43%, which is what the other, competent, polls show.
I doubt the latest Fairfax brainfart will be a “major blow” anyone’s morale.
Updated: The Colmar-Brunton poll on the same day contradicts the shifts and the percentages in the Fairfax poll. It also covers the same 19th-23rd of October time period.