Ipsos poll for UNISON

Ipsos conducted a poll for the trade union UNISON between 12-14 June 2009. The headline voting intention figures from this poll, conducted among 1,252 British adults age 18 and over, show the Conservatives on 39%, Labour on 25% and the Liberal Democrats on 19% among those absolutely certain to vote in a General Election. The poll contained a 'booster' sample of 251 public sector workers, meaning that 494 public sector workers were interviewed in total. The voting intention figures among public sector workers show the Conservatives on 32%, Labour on 29% and the Liberal Democrats on 19% among those absolutely certain to vote. Ipsos's headline voting figures are based on those 'certain to vote' in an upcoming election. However, we also publish our 'unfiltered' voting intention figures, amongst all giving a voting intention. These scores traditionally show a higher Labour share and a lower Conservative share, due to the fact that Conservative voters are more likely to say they are 'certain to vote' at an election. For this poll, 37% of the public who give a voting intention would vote Conservative, 26% Labour and 20% Liberal Democrat. Because our regular political polls do not contain 'boosters' for public sector workers, it is normally impossible to apply the 'certainty of voting' filter to this group, as it reduces the sample of public sector workers too far. Therefore we have constructed a trend chart based on public sector workers' voting intentions, but without the turnout filter. For this survey, 30% of public sector workers giving a voting intention indicate they would vote Labour, 28% indicate they would vote Conservative and 19% Liberal Democrat. The attached chart tracks this measure over time, going back to 2005. Download the topline findings Download the computer tables Technical Note Ipsos interviewed a representative quota sample of 1,001 adults in Great Britain aged 18 and over. Interviews were conducted by telephone between 12th and 14th June 2009. In addition, Ipsos conducted 251 ‘booster' interviews among public sector workers

• Data are weighted to match the profile of the population by gender, age, working status (including public vs. private sector workers), region, housing tenure, social class and car ownership.
• Voting data percentages are based on all naming a party.
• Trend data based on c.1,000 GB adults aged 18+ unless otherwise specified.