There is a day time program "night mare landlords, tenants from hell" which might give an education.
But rent rise control is not the same as abolishing section 21.
What the rises actually show is the abject failure of migration policies putting far too much pressure on accomodation in cities such as London and Dublin. If we had not had a 10% percent population increase in Britain , most of whom seemingly want to reside in the capital, (or indeed the stupidity of central bank monetary policies creating cheap money to fuel these bubbles) then the pressure on accomodation and price rises would not happen. As we speak a bubble is building Germany and about to collapse in australia and china.
All the policies are interconnected.
Inter EU migration DOES NOT WORK is at the root of this - they need to make their own countries attractive by getting rid of the euro. Incidentally the dutch rival party running Rutte neck and neck propose a referendum on just that!
Using section 21 abolition is like dropping a ten ton weight on a car. Sure it will stop the car. Permanently. It is not a solution aimed at the right problem of slowing the car.. It would be better to look at improving brakes instead. ie solve the actual problem, not the symptoms of the problem. Better sill reduce the 300000 coming here each year adding the extra demand.
That is the falasy behind Corbyns complaints about both rent increases and "build bridges not walls" so not curbing migration. He can have one not both. He lives in a unicorn utopia in which everone can have everything with no negative consequence. And sadly people believe him. But he lives in a fools paradise. Putting too many in a lifeboat sinks it. The way to reduce prices is increase supply or since that is impossible in London reduce demand. The migrants.