Councils already have substantial powers to deal with substandard rented property
england.shelter.org.uk/get_advice/repairs_and_bad_conditions/complaints_and_court_action/contacting_environmental_health
"An environmental health inspection should identify the cause of health and safety problems in your home.
Contact the environmental health team at your local council. The team may be part of another section like housing standards or housing advice.
Use Gov.uk's search to find details of your local council.
There may be a reporting form on your council's website. Or you may find contact details of the department you can write to, phone or email.
It is usually best to tell your landlord about problems with the condition of your home before contacting the council. Your landlord might fix the problem.
What environmental health can do
If you are a private renter or are a housing association tenant and there's a risk to your health or safety in the home, the council can decide to:
order your landlord to carry out repairs or improvements – they'll serve your landlord with an improvement notice
do the repairs itself and charge your landlord for the work
When conditions are very bad, the council can:
make a prohibition order – this restricts access to all or part of your home or restricts the number of people who can live there
order the demolition of the property
In less serious cases, the council can serve a hazard notice to make your landlord aware of the problem.
If you are a council tenant, an enviromental health report can be useful to let your housing department know what work is needed to make your home safe."
So what did this amendment add?
I really really hate these threads where the poster gets wound up about a situation without doing the most basic research.