Ukip leader Nigel Farage claimed the party is on its way to winning the Conservative seat of Thanet South as polls showed him holding a wide margin over his opponents.
Mr Farage also accused Labour and the Conservatives of indulging in negative campaigning and insisted his party would focus "on the politics of hope and inspiration".
He added that immigration was the topic dominating the election and Ukip was the only party which could regain control of Britain's borders.
Mr Farage was addressing the party's Spring conference in Margate.
Ed Miliband has said a £3,000 cut to university tuition fees would come into force in September 2016 if Labour are elected.
He told supporters it would will benefit not only those starting degree courses next year, but "those already at university" and slash an average of around £9,000 off each student's debt.
Mr Miliband also said that maintenance grants will be raised by £400 a year, and that Labour is "determined" to help students with their living costs.
Ed Miliband has pledged to cut university tuition fees from £9,00 a year to £6,000.
The Labour leader said if the party were voted in at the General Election they would make life better for young people.
He also pledged to offer:
- 25 hours of free childcare for every child aged three and four
- Lower class sizes for five, six and seven-year-olds to 30 or under
- Guaranteed apprenticeships for teenagers if they get the grades at 18
Ukip remains the party most trusted to control immigration despite more people seeing them as racist, a ComRes/ITV News poll has found.Read the full story ›
Labour leader Ed Miliband is due to set out his party's plans on how it would cut tuition fees.Read the full story ›
The failure is damaging for the Tories and they know it although they've been trying to manage expectations on net migration for a while.Read the full story ›
David Cameron's pledge to slash net migration to the UK by the end of this Parliament appears to have been thoroughly broken.
In fact the net influx of nearly 300,000 migrants in the year to last September, is the highest since the Coalition government came to power.
ITV News' Political Editor Tom Bradby reports:
The chair of Ukip's lesbian, gay, bisexual and transgender (LGBT) supporters has left the party, citing "dissatisfaction at the failure of the leadership to set a gay-friendly tone".
Last night I stepped down as Chairman of LGBT* in UKIP and gave up my membership of #ukip. I'll remain unaffiliated...for now ;-)
@r4vi very simply, I found that I couldn't defend the party or convincingly campaign for it any more.
"It became increasingly difficult for me to argue for a non-Classical Liberal manifesto," Booker added.
He later told PinkNews magazine he had resigned "due to disillusionment of policy direction and dissatisfaction at the failure of the leadership to set a gay-friendly tone".
The Government has blamed a rise in EU migration for missing its target to cut net migration to the tens of thousands before the general election.
Immigration Minister James Brokenshire told ITV News: "We have said for some time that we would not meet that target that we set because of circumstances that couldn't be predicted.
"We have had migration from Europe that has doubled since the last general election therefore the circumstances have changed markedly."