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Labour is due to launch its manifesto, which the BBC has learned will include a pledge not to raise income tax rates.However, it is understood it will not include a similar pledge on VAT.
Prime Minister Gordon Brown promised that a fourth Labour term would "rebuild the economy, renew our society and restore trust in politics".
Tory leader David Cameron said Labour had "no new ideas" and Lib Dem leader Nick Clegg said the party "cannot be trusted" to deliver a fairer Britain.
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Labour's programme is due to be launched by Gordon Brown on Monday as the election campaign enters its second week.
The first line of the document will be a tribute to troops in Afghanistan.
The BBC understands that despite a commitment not to raise income tax rates, there will be no pledge on VAT rates - but the manifesto will commit to no expansion of the scope of VAT.
It will also promise to keep business taxes as low as possible.
BBC political correspondent Iain Watson says Labour sources are flagging up as "radical" a pledge that underperforming police forces could be managed by more successful ones.
Similarly, more rights will be offered to parents at schools in England, including allowing them a ballot to change the ethos or leadership of a school.
Patients in England will receive commitments on health diagnoses including a one-week guarantee to get results from a test for cancer.
Those in long-term unemployment will get a right to a job or training, but there will be no right to refuse a job or training.
The manifesto will also commit Labour to having council house-building at the rate of 10,000 a year by the end of the next parliament.
The BBC understands it will also include a commitment to doubling paternity leave from two to four weeks, while there is also expected to be support for first-time homebuyers, including an initiative to help low-income families buy property.
Plans to restrict takeovers of British firms on public interest grounds, following the controversial takeover of Cadbury by US food giant Kraft, are also likely to feature.
However, the BBC's Robert Peston said these would focus on specific industries - like the energy sector - rather than applying across the board.
The Conservatives have given a flavour of the themes underpinning their manifesto, which will be published on Tuesday.
Reports suggest that a "stabiliser" to cushion the blow of oil price rises for motorists will be among the Tories' pledges.
In the foreword to the document, their leader David Cameron urges everyone to "join together...to start to fix the economic, social and political problems that threaten the nation".
Mr Cameron said: "What you're going to see from the Conservative manifesto is a clear recognition that real change isn't just government producing manifestos, but recognising we're all in this together. Real change comes when you work together with people.
"I think there's a contrast in this campaign, frankly. No new ideas from Labour, a very negative campaign, all about attack and trying to scare people - and very positive, agenda-setting ideas from the Conservatives."
Mr Clegg said the Labour document would be "yet another manifesto for an unfair Britain".
He added: "Despite everything they said in 1997, life has got harder for people at the bottom and easier for people at the top.
"All the promises of fairness in Labour's manifesto should be taken with a barrelful of salt. They cannot be trusted."
As well as the manifesto launches, the campaign's second week will see the first debate between Mr Brown, Mr Cameron and Mr Clegg.This article is from the BBC News website. ? British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.