Rentals should only be through councils and at social housing rates. Owners can let their property but in agreement with the council. There should be a limit on the number of properties someone can own. Rent should be capped.
All Rentals should be 'affordable' to someone working FT at NMW.
DH rented with his ex in around 1970, peppercorn rent, landlord were keeping an inherited property until their own DC grew up. All they wanted was enough to cover upkeep. DH, for years, believed all private rentals were this way and was horrified that we had to pay full rate around 30 years ago let alone Rentals costs now. Fortunately, we got a council house and so pay a sensible rent.
My vote will go to whichever party commits to large-scale council housing build.