Ed Miliband is expected to point out that 3.6 million households - including one million with children - are now privately-rented accomodation.
"We cannot have two nations divided between those who own their own homes and those who rent", the Labour leader will say.
"There are too many rogue landlords and agencies either providing accommodation which is unfit or ripping off their tenants", he is set to add.
More top news
The Tonight programme looks at government efforts to improve our general wellbeing, and offers tips on how we can all boost our happiness.
While writing The Great Fire, I was interested to find striking parallels between Britain in 1666 and modern-day equivalents.
Tory Chief Whip Michael Gove has taken time out from his schedule to claim second place in Westminster's Dog of the Year competition.