[mattylad]

Nice idea but I doubt it will work in practise, how are they going to know who all the landlords are in the first place & what can they do if they do not join in this (is it another "voluntary" scheme?) and what about all those landlords that the council cannot even contact now?
How are they going to contact them to get them to obey this missive?

The good landlords will follow this but the bad ones will shy away & have nowt to do with it.

And what law will require them to follow this?

Before you answer about the law, make sure it includes all the above requirements within the act or its worthless