Not influential

• 2017 election

  • Most polls predicted a comfortable Conservative majority and didn't pick up the 'youthquake', an increase in younger voters who were prepared to turn up at voting booths and vote for Labour candidates
• 2016 EU referendum

  • The polls indicated that the Remain side would win and yet it didn't
• Opinion polls

  May be affected by party policy rather than the other way around Labour's manifesto in 2017 shifted and shaped opinion on public spending