It's not very often that Nicola Sturgeon tweets about a Britain-wide opinion poll, and I was initially slightly puzzled as to why she singled out ("it's time for independence, Scotland") today's new poll from Opinium. It shows Labour with a six point lead over the Tories, with Nigel Farage's new Brexit Party one point further back in third place. On the face of it, that's better for Labour and less good for the Brexit Party than other recent Euro election polls. But then I took a closer look and realised it's not a Euro election poll. It's a Westminster poll.
Britain-wide Westminster voting intentions (Opinium):
Labour 28% (-2)
Conservatives 22% (-3)
Brexit Party 21% (+4)
Liberal Democrats 11% (n/c)
Greens 6% (+1)
SNP 4% (+1)
UKIP 4% (n/c)
Change UK 4% (+2)
(Note: I've updated the above figures to include the SNP and Change UK, and also to correct the percentage changes - it turns out there was also an earlier Opinium poll that we didn't know about.)
Yes, folks, Opinium really are saying that if there was a general election tomorrow, the current governing party would be essentially tied with a hard-right populist party that was only formed a few weeks ago. That almost certainly wouldn't translate into parity in terms of seats, because the first-past-the-post electoral system would punish the Brexit Party for support that is too evenly spread. But the flip-side of the coin is that once a party becomes popular enough, it suddenly gets rewarded for evenly spread support - that's how the SNP ended up winning almost every seat in Scotland in 2015. Nigel Farage is potentially only a few percentage points away from becoming Prime Minister in a snap election.
Is it credible to believe that this nightmare scenario could actually unfold in real life? As an election approaches, voters often revert to old habits - for example, the Liberal Democrats still ended up in third place in 2010 in spite of the "Cleggasm" that temporarily propelled them into a lead in the polls. But there could be a tipping point if Tory MPs start defecting to the Brexit Party. It's certainly conceivable that if Britain hasn't left the European Union by the time the election is held, Nigel Farage could end up leading a sizeable group of Brexit Party MPs in the House of Commons.
Meanwhile, it must be some kind of record for any party to be leading a Westminster poll on just 28% of the vote. It's perfectly conceivable to win a majority on that sort of vote if you have a big enough lead over the second placed party. Would there come a point where even the Labour and Tory dinosaurs might start to conclude that the perversities of first-past-the-post are getting beyond a joke?
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UPDATE: A Westminster poll from ComRes shows much the same picture, except that it actually has the Brexit Party in second place...
Britain-wide Westminster voting intentions (ComRes):
Labour 27% (-6)
Brexit Party 20% (+6)
Conservatives 19% (-4)
Liberal Democrats 14% (+7)
Change UK 7% (-2)
Greens 5% (+2)
SNP 3% (n/c)
UKIP 3% (-2)