Sky Poll: 'Noise' Leaves EU Voters Undecided

Sky data shows 29% of voters are still making up their minds how to vote in the EU referendum.

Despite numerous reports predicting various outcomes from the UK's decision, 40% of the electorate still feel they would like more information.

With three weeks before the polls open on 23 June, the undecided voters are large enough to sway the decision either way - but so far neither campaign has managed to secure this elusive group.

If anything, the group has become larger since the beginning of the year.

A YouGov poll found that after David Cameron secured his deal in Brussels earlier this year the number of undecided voters started to rise, from 19% in February to 24% in March and April.

It suggests the claims and counter claims of the campaigns - what some politicians have dubbed "noise" - have been leaving people even more perplexed.

Political analyst Adam Faegan says this group of voters holds the key to which way the country goes.

He said: "They're absolutely critical. Turnout is critical and so are those who are undecided. We can't say with any certainty that they'll go one way or the other. It will probably be an even split."

There is a theory that undecided voters are more likely to chose the perceived safe option to remain in.

However, Sky data suggests the primary concern for undecided voters is immigration, with 63% of Britons saying it has a negative impact on British culture.

Our research also shows that Brexit voters are unlikely to be swayed by a reduction in immigration numbers - while those who say they are inclined to vote Remain are more likely to change their vote if they see immigration figures rising.

Figures published by the Office for National Statistics last week showed net migration rising to 333,000.

The economy is a key factor for those who have decided to vote to remain in.

Paul Drescher, the president of the Confederation of British Industry (CBI), says he believes the Remain camp needs to focus on messages about jobs - and the impact on people's pockets.

"The question people need to ask is, 'Will there be more or less jobs?' In all the analysis we've done, there will be less jobs if we leave than if we remain."

But Out campaigner Iain Duncan-Smith told Sky News: "There's no reason why anyone should lose jobs. In fact Vote Leave think economic arguments are such that we'll be able to thrive and prosper. What's more, Lord Rose, who is campaigning to Remain, said the moment we leave, salaries and wages will rise."

Despite the large numbers who are still uncertain, polls suggest that in recent days voters are beginning to make up their minds. This is a crucial time for both campaigns.

:: EU In or Out: David Cameron Live, Sky News 8pm Thursday, Michael Gove Live 8pm Friday.