The snap ICM poll following the second Salmond-v-Darling debate shows a convincing win for Alex Salmond. 26% think Darling won the debate, 65% think Salmond did, 9% didn’t know. Tabs are here.

In the ICM poll following the first debate last month the large majority of existing YES voters thought Salmond won, the large majority of existing NO voters thought Darling won, don’t knows were pretty evenly split – hence a Darling victory. In second debate poll existing YES voters almost all thought Salmond won, only a bare majority of NO voters thought Darling did, the small number of don’t knows favoured Salmond – hence the Salmond victory.

Will it have any impact on voting intentions? Well, that’s a different question. Amongst the respondents in the survey there was no difference in the NO lead before the debate and the NO lead afterwards, but that doesn’t necessarily mean much. Remember that the instant verdict poll gave the first debate to Alistair Darling, yet of the four polls since the first debate only one showed significant movement toward NO, two showed modest movement toward YES, one showed significant movement toward YES. Instant reaction debate polls do their job of crowning a debate victor… but they don’t necessarily do a good job of predicting the impact.