YouGov have a new Scottish poll out tonight, done jointly for the Sun and the Times and YouGov’s first since the second debate between Alex Salmond and Alistair Darling. YouGov’s previous poll showed a significant four point shift towards YES, narrowing the NO lead from 22 points to 14. Today’s poll doesn’t just confirm that, it goes further – topline figures are now YES 42%(+4), NO 48%(-3), Don’t know or won’t vote 10%(-1). Excluding don’t knows this is YES 47%(+4), NO 53%(-4).

This means that over a month YouGov have shown the referendum race coming right in from a pretty consistent NO lead of around twenty points right down to just six points. The sharp narrowing of the gap echoes the Survation poll after the second debate which had looked as if it was just a reversion to the mean. This suggests something more is afoot.

As ever, we should be careful of reading too much into a single poll – it’s the wider trend that counts – but it looks like this may go right down to the wire (and considering that YouGov tend to show some of the less favourable results to YES, does make one wonder what the next poll from a company like Panelbase might show).

UPDATE: Also out tonight is the monthly ComRes/Indy telephone poll which has topline figures of CON 28%(+1), LAB 35%(+2), LDEM 9%(+1), UKIP 17%(nc) and the daily YouGov/Sun poll which has topline figures of CON 34%, LAB 35%, LD 7%, UKIP 14%