Your landlord has to make sure that your home meets certain standards. It must be:
safe and free from ‘category 1 hazards’ - these are things that can cause death or pose a serious danger to your health (eg by causing lung cancer, 80% burn injuries, loss of limbs, poisoning)
in a reasonable state of repair
equipped with reasonably modern facilities
warm enough
If you have concerns about the standard of your home you can make a complaint.
As a social housing tenant you can help run a maintenance service.