A row over tax has blown up between coalition partners, as Lib Dem leader Nick Clegg claimed the Tories of constantly pushing for tax cuts for the rich whilst in government.
Meanwhile, Labour and the Conservatives threw accusations at one another, each claiming the other party had secret plans for tax rises.
ITV News deputy political editor Chris Ship reports:
The personal tax allowance would rise to £12,500 under the Lib Dems, funded by a crackdown on tax dodgers, leader Nick Clegg has revealed.
Millions of households would be better off under a Tory government, David Cameron will claim today as he hails "money-back Monday".
A Conservative government would aim to double the number of first-time buyers by 2020, the Chancellor has declared.