I've been living in a rented flat for 4 years. It is a basement flat in Central London, and the landlady lives in the upper floors. She is lovely and we never had any problems. She has offered to fix broken appliances and has bought a new oven when it broke a couple of years ago. The flat was fully furnished when we moved in.
Since my partner and I moved in, we noticed a problem with damp and mould. The landlady is aware of the problem and I think it is a hard problem to fix. The leaks come from upstairs (where she lives) and fixing it might require some pretty big work to be done. My partner and I painted the walls a few months ago but the mould is coming back again this summer, mostly because the heating is off and there is a lot of damp.
He went away on holiday for a week in July, and came back to find all my wool and cashmere sweaters grey with mould. I was not expecting that, since I moved all sweaters to some Ikea mesh drawers which let a lot of air come through. I now have a dry cleaning bill of £150, and have decided that it will be best to turn the heating on for a couple of hours a day to avoid further damage from mould and damp. I haven't spoken to my landlady about this yet (this has just happened a week ago) but AIBU to ask her to deduct at least part of the dry-cleaning and heating costs from our rent? I don't want to seem unreasonable or greedy, but the damp is a chronic, possibly "unfixeable" problem in the flat, so I think this may be justified...