@ProDave spot on .
It sounds ‘ bad ‘ but it was never feasible . If forced to upgrade to a C and it’s too expensive only option is to sell . How many properties would suddenly come on the market ? , how many tenants would be evicted ?
It would create a massive problem- where housing is already a massive problem.
Bit like labours U turn on rent capping .
The parties are all starting to realise the scale and complexity of the problem ….
If in doubt don’t make it worse .