Who are Britain’s undecided voters?

They’re the group every party wants to win over – Britain’s undecided voters. But who are the millions of people who still don’t know which party to back on Thursday? We’ve been taking a look.

Latest polls from More in Common, Opinium and YouGov suggest about one in eight voters in Britain still don’t know who they will vote for, so millions of votes remain up for grabs. But what do we know about these undecided voters?

They tend to be women. Nearly two thirds – 62% – of undecided voters are female, according to a poll by More in Common released yesterday.

And this is revealing – undecided voters are more likely to be people who voted Conservative last time round.

Two in five of this year’s undecided voters – 40% – voted for Boris Johnson in 2019. Just 13% voted for Labour under Jeremy Corbyn.

The campaigns know this too and courting voters who backed Boris Johnson’s Tories in 2019 has clearly been a key factor in this election.

But that’s not the whole story.

Put aside ‘undecided voters’, there’s another category of voters who tell pollsters they have made up their mind, but might still switch at the very last minute.

36% of voters could still change their mind, according to Ipsos. This compares to 27% who thought they might do the same before the 2019 general election.

That’s why people are talking about voter volatility – a significant number of voters may change their minds right up until they cast their votes.

So undecided voters or last-minute switchers could still have a very big say on who wins this election – and by how much.