Were the mice in the property when you moved in?
How long after you moved in the device manifest themselves?
Have the council told you the situation if there are eviction proceedings?
I appreciate the landlord has served with a section 21 notice but are you on speaking terms?
How old are your 2 children?
If the infestation is there when you move in, that it is the landlord’s responsibility. If it arrives after you moving, then it is your responsibility.
It appears that you are already involved the Environmental Health Department at the local authority and that is the correct thing to do.
The local authority will not housed you simply because the landlord has given you notice to quit.
The landlord must give you notice and then must go to court and get an order for possession. The next part of the process is that he has to apply for a warrant for possession which is an order for bailiffs to come and evict you..
Keep the housing department at the local authority appraised of the situation but they will only consider rehousing you once there is an order for possession. I’m afraid that’s how the system works.
You have a dependent child under 18 (apart from his unfortunate illness) and the local authority are under a duty to rehome parents with dependent children. It’s just that the process is a bit more long-winded and does tend to happen on a bit more of an emergency basis once there is an order for possession.
Can I clarify anything for you?
Please do not forget to rate the service positive. It’s an important part of the process whereby experts get paid.