The Prime Minister David Cameron has been boosted after the Conservative Party closed in on the Labour Party in the opinion polls ahead of the 2015 General Election.

The latest survey from YouGov for The Sun, which questioned 1,671 people, found that 33% of respondents would vote for the Tories at the next election, against 35% of people who would vote for Labour.

The research showed that Labour had dropped 1% in the polls and the Tories had increased by 2%.

The study also found that Ukip had decreased in popularity among the electorate, with 14% of respondents saying they would vote for Farage's party – down from 16%.

The Liberal Democrats' poll rating remained steady at 7%, according to YouGov.

The figures come after the shadow chancellor Ed Balls said a Labour government would keep the Coalition Government's 1% on child benefit.

The move, he told delegates at the Labour Party's annual conference in Manchester, would save £400m ($654m, €508m) over five years.

"I want to see child benefit rising again in line with inflation in the next parliament," Balls is expected to say," Balls said.

"But we will not spend money we cannot afford. So for the first two years of the next parliament we will cap the rise in child benefit at 1%."

"It will save £400m in the next parliament. And all the savings will go towards reducing the deficit."

The move means child benefit hikes would be less than the most recent rates of Consumer Price Index (1.5%) and Retail Price Index (2.45%) inflation.

Balls also attempted to boost Labour's economic credibility among the electorate during his speech.

The shadow chancellor emphasised that a Labour government would "balance the books" and make "tough decisions".

The opinion poll findings come ahead of Ed Miliband's speech to the Labour Party conference.

He is expected to announce plans on to use a "mansion tax" to fund increased spending on the NHS.

Almost three quarters of people (73%) consider the NHS to be "one of the UK's greatest achievements", according to a 2013 YouGov poll.