Pledges on the economy, businesses and mental health are expected from Westminster's party leaders as general election campaigning continues.
Lib Dem leader Nick Clegg will make a manifesto commitment to spend an extra £3.5bn on mental health services.
The Conservatives will promise to create two million more jobs in the next parliament, while Labour will offer rate cuts for small businesses.
There are 37 days to go until the general election on 7 May.
On day one of the official election campaign:
- The Conservatives defended a claim that working families faced a [Only registered and activated users can see links. ]under Labour after a leading think tank said the figure was "unhelpful"
- [Only registered and activated users can see links. ]amid a row over corporate backing for its EU policy
- Mr Clegg said his party would occupy the "[Only registered and activated users can see links. ]" during the campaign
- UKIP leader Nigel Farage unveiled [Only registered and activated users can see links. ]
- The Green Party of England and Wales said it [Only registered and activated users can see links. ]
- Chancellor George Osborne said details of the Conservatives' planned £12bn welfare cuts would be set out in a spending review after the general election
Mr Clegg is expected to mark day two by unveiling more plans for mental health investment by his party. This would include £250m for new services for mothers suffering from depression and to help reduce waiting times, the party said.
David Cameron met the Queen after Parliament was dissolved
Ceremonies marking Parliament's dissolution took place in London, Edinburgh and Cardiff
Nick Clegg is to make a new mental health care spending ledge In the Budget earlier this month, the coalition government said it would invest an extra £250m a year into improving mental health services for children. The Lib Dems say their manifesto would commit to increasing the total spend on mental healthcare to £3.5bn over the next six years.
Mr Clegg will say his party would "make sure mental health is treated with the same urgency as physical health, with money to back that up, and challenge the stigma every day".
Following the flurry caused by YouGov's 4% Labour lead this Sunday, we had three polls on Monday telling a different story.
Populus had Conservative and Labour tied on 34%; Ashcroft had a 2% Conservative lead (36% versus 34%) and ComRes had a 4% Conservative lead (36% versus 32%).
Among all four polls, the average Lib Dem rating was 8%, UKIP's was 13% and the Greens at around 6%.
We've barely started our long road to 7 May but perhaps this campaign will develop into a battle of methodologies - telephone versus internet polls.
The two telephone polls (Ashcroft and ComRes) had the highest Conservative ratings - 36% each; and the two internet polls (YouGov and Populus) had the lowest - 34% and 32%.
YouGov represented a 5.5% swing from Conservative to Labour, enough to give Labour a majority: ComRes suggested a 1.5% swing to Labour, barely a ripple on the election pond.
Increased employment is a key part of the Conservatives' campaign, although critics claim a large number of the new jobs are low paid or on so-called "zero hours" contracts.
Prime Minister David Cameron will outline his promise of two million more jobs by 2020 - similar to the 1.9 million created in the last Parliament under the coalition - saying the Conservatives are "the jobs party".
Shadow chancellor Ed Balls, meanwhile, will highlight Labour's existing plan to cut business rates for small business properties and then freeze them by promising to take action in his first Budget.
The party says the measure would save businesses an average of £400 and would be funded by cancelling a planned cut in corporation tax for large companies.