Support 100 years of independent journalism.

  1. Spotlight
  2. Elections
28 October 2014

As expected, Greens fall back to 5 per cent in Ashcroft’s weekly poll

Today’s poll blast: the Greens fall back below the Lib Dems, as we forecast last week.

By harry harry

Explore May2015.com for the latest election features, profiles and predictions. 

Last Monday we looked at how Lord Ashcroft’s weekly poll was probably putting the Greens too high at 8 per cent.

“…we should be wary of the finding: Ashcroft’s data suggests 28 per cent of 18-24 year olds are now planning to vote Green.

“There are only 56 weighted 18-24 year olds in Ashcroft’s poll – so we can’t say 28 per cent of them are actually going to vote Green.

“…this is only one poll. We should hesitate to say 8 per cent of the population are now converts. … We can only take sub-breaks seriously over time. And YouGov’s have shown the party’s youthful support at far lower levels than today’s poll implies.”

Sign up for The New Statesman’s newsletters Tick the boxes of the newsletters you would like to receive. Quick and essential guide to domestic and global politics from the New Statesman's politics team. The New Statesman’s global affairs newsletter, every Monday and Friday. The best of the New Statesman, delivered to your inbox every weekday morning. A handy, three-minute glance at the week ahead in companies, markets, regulation and investment, landing in your inbox every Monday morning. Our weekly culture newsletter – from books and art to pop culture and memes – sent every Friday. A weekly round-up of some of the best articles featured in the most recent issue of the New Statesman, sent each Saturday. A weekly dig into the New Statesman’s archive of over 100 years of stellar and influential journalism, sent each Wednesday. Sign up to receive information regarding NS events, subscription offers & product updates.
I consent to New Statesman Media Group collecting my details provided via this form in accordance with the Privacy Policy

This didn’t stop the Guardian declaring a poll “surge” for the party, and talking of multiple “polls” putting them on 8 per cent. John Harris’ anti-establishment roadshow was duly dispatched to Bristol West, which the party is targeting.

Now Ashcroft’s weekly poll has put the party back at 5 per cent.

So much for the surge.

The Greens shouldn’t be ignored, and perhaps should be in the leaders’ debates, but last week was a case study in the way some pundits can blow up the modest findings of pollsters.

The full data tables for each poll can be found here (last week) and here (today).

This is how the percentage of each age group supporting the Greens changed over the two polls:

This explains why the Greens have dipped back down to 5 per cent.

Last week’s poll gave a headline of “8 per cent Green” because 42 of the 517 weighted respondents backed the party. 16 of them were 18-24 year olds (out of 56 weighted respondents – i.e. 28 per cent – but this is based on 38 actual replies. Only 11 18-24 year olds would have actually said they would vote Green but the age group’s poor response rate meant they were made into 16).

This compares to 4 out of 44 18-24 year olds this week (35 actual replies), and 28 out of 511 respondents overall (i.e. 5.4, or 5, per cent).

These are clearly small numbers, and scarcely ones that should be shaping column inches. The margin of error for 500 respondents is nearly 5 per cent. The data is useful over time. The fault isn’t with Ashcroft or any other pollster (we looked at how YouGov’s Scottish sub-polls were distorted by the Mail and Breitbart last week), but the way polls are reported.

For a more in-depth look at the Green vote, Peter Kellner today looked at how three weeks of YouGov samples have put the party on around 5, rather than 8, per cent.

Explore May2015.com.