Why Labour's Lead Probably Won't Translate to a 470-Seat Landslide
Best for Britain have just released a new MRP poll, leading with the projection that Labour would be sat on 470 seats - which would amount to a majority of 290. The figure came about on a Labour vote share lead of 12%, with the party on 35% to the Conservatives' 23%. The fact that such a large parliamentary win comes about from a more modest vote lead flies in the face of some commentary - which suggested a double-digit lead could be the minimum requirement for a majority government. However, it's worth looking closer at their seat projections before Keir Starmer can start measuring up his Downing Street desk.
Even a cursory glance at the headline figures should give cause for scepticism. The model predicts the Liberal Democrats will win just five seats, which seems counter-intuitive even on a drop in vote share. Meanwhile, the first-place finisher in two separate seats was... "don't know".
Another reason to add caution to seat projections is that a large portion, 32%, were marginal. 202 of the 632 projected seats were within a margin of 5%. This means a small margin of error or shift in vote share could result in a significant change to seat figures.
Best for Britain does account for "don't know" responses by reallocating votes by education profile. This leads to a more intuitive Labour seat profile - with 370 wins. However, it leaves the Liberal Democrat total on just 1 seat. After their local election results, they would hope to be doing much better...
Despite these disparities, the polling does help illustrate important dynamics in electoral politics. The model sees Labour lose just 48 seats compared to their Autumn model, which isn't much considering their vote share lead was slashed in half. In large part, this is accounted for by the SNP's collapse in Scotland which, in line with the predictions of YouGov's MRP, gives Labour a significant structural boost.
The importance of Scotland is further demonstrated by the proportion of seat forecasts which end up as marginal. In Best for Britain's model, Labour has 36 marginals in Scotland - accounting for 18% of their national total. This is a larger proportion than any other region. Scotland is, again, shaping up to be a key battleground in the next election. Of course, this is all worth the major caveat that we still look to be over a year out from the next election.
