Here's a summary of the main political stories of the day:
Nick Clegg said no party would win an outright election victory and warned voters they face a choice between the Lib Dems, the SNP and UKIP over who holds the balance of power. Launching his manifesto , the Lib Dem leader said he would seek to form a "coalition with conscience" that would not "lurch off to the extremes".
UKIP - which also launched its election manifesto today - said it would make working people better off through a "low-tax revolution".
In an interview with the BBC's Evan Davis David Cameron says accusations that the Conservatives are "the party of the rich" make him "more angry than almost anything else".
And finally, the SDLP has launched its manifesto , in which it calls for a prosperity process for Northern Ireland to expand its private sector.
That's it for tonight. We'll be back with all the news analysis and reaction to the political stories of the day from 06:00 BST tomorrow. Goodnight.