As a tenant, you have the right to live in a home that is kept in a reasonable state of repair. The Landlord is legally responsible to maintain it under section 11 of the Landlord and Tenant Act 1985.
Your landlord is responsible for repairing:
You as a tenant also have responsibilities:
If repairs need doing you should inform the landlord as soon as possible in writing and give them a reasonable deadline to carry out repairs. You should carry on paying rent while waiting. There are options available if the repairs are not carried out such as informing the housing department and/or environmental health departments at your local council. You can also arrange for repairs to be carried out and deduct the cost from the rent; however please seek legal advice before doing so as there is a procedure which must be followed.
Another option includes taking legal action for a court to order your landlord to carry out the repair work needed. The court can also be asked to consider ordering the landlord to pay compensation for inconvenience and any damage to personal property or health.