I rent a first floor flat in a converted house where there is also only a ground floor flat. An elderly lady owns that flat and the landing outside my door belongs to her property too.
The neighbour keeps her walking frame outside my door, on the landing, which she doesn't use (she told me that plus I've never seen the thing moved and I'm in and out a lot as I work from here). 12 months ago we had a conversation about the frame as I thought it was a health and safety hazard as when I open my door and come out, there is a space of about 40 cm and then there is the frame. The landing outside my door is also taken up by the meters cupboard and her flat door is opposite the front door, the distance is maybe a meter. So whenever I come in and out I bump into the frame (not too mention the times when I have my shopping with me). Back then she said she was willing to take it in, but in the end I told her not to worry and that I don't mind, it being there (she's 80-something so I thought if it was more convenient for her, then be it, etc).
Now I knocked on her door, to let her now that I will be having a baby in 2 weeks and whether she could put her frame inside as I simply won't be able to wheel the pram out of my door to come out. I thought, in the light of the previous conversation, that my request was quite sensible. Before I finished speaking, I was told it's not her fault I'm pregnant 
and if I am pregnant I should not be living here. She said she won't move it and how do I dare to tell her what to do with her property. The old bat made my cry and finally I told her the frame just has to go.
When I want to wheel the pram out, I will have to pick her frame, move it outside the front door, wheel the pram outside and then put the frame back in. I even offered to put it in my loft but now apparently she uses the frame after the exercise (as I said, the frame is always there so that's not true but I guess it is beside the point). I will be calling my estate agent and the council on Monday but would appreciate any advice you might be able to give me in the meantime.