Check out -
http://www.direct.gov...ngYourHome/DG_4001391
This details a landlords responsiblity in renting out a property. These things include:-
1. repairs to the structure and exterior of the property, heating and hot water installations, basins, sinks, baths and other sanitary installations
2. the safety of gas and electrical appliances
3. the fire safety of furniture and furnishings provided under the tenancy
4. ensuring that the property is fit for habitation (which it sounds like it wasn't)
5.repairing and keeping in working order the room and water heating equipment
6. the common areas in multi-occupancy dwellings
7. providing an Energy Performance Certificate (EPC) to new tenants
It sounds like you may need professional advice to issue proceedings against him.