I’m having recurring problems with one neighbour about parking, not sure if she is BU or I am. I’ve made a diagram but I suspect it might make my post less clear 
the diagram shows how we are now parked.
We all live in quite small 1930s semis. Each pair of houses has a joint dropped curb leading onto narrow drives, and then a small-ish curb in between the next pair of houses. One of the long buses drives down one side of the street every 20 minutes so we all park on the other side when parking on the street because the bus can’t easily weave between parked cars on both sides.
Most people, including me (yellow house) park on our drives. Sometimes, like today when I have a plumber over, I’ll park on the street and leave my drive free for easier access to tools etc. A couple of weeks ago I parked next to the curb (green in the diagram) outside neighbour (pinks) house. I parked in the middle because the curbs are quite short and I didn’t want my car to stick out too much on either end and make it hard for the cars on the drive to get out. Also, the curb is so small I’ve never seen two cars parked on any of them, everyone else parks one car in the middle. Neighbour (pink) came over and asked me to ‘be more considerate’ and park right up to the edge of her dropped kerb so she could squeeze in her car on the street as well. she only has one car which she parks on her drive but wanted to have the option to move it onto the street overnight. She was also rude. She didn’t introduce herself or say please or thank you, just demanded I ‘be more considerate’. I was annoyed but I stayed pleasant throughout. I apologised for the inconvenience, introduced myself, moved my car and I’ve avoided parking near her house since.
Today I had to park there again (and will need to for a while, gas pipe maintenance has blocked our drives). I parked as close to the dropped curb as possible as she had asked last time. Within minutes she rang my doorbell, asking me to move again. I asked her why and she said she’d like to park across her own dropped curb but the drive on her side wasn’t as wide as her car so she wanted part of the car to be where I had parked (legally). Again she was rude and aggressive. I got annoyed and I said that whilst I was willing to move my car, I was doing so as a favour and I expected to be asked politely. If she wants to reserve the space outside her house then she needs to say that clearly, as I work from home and cannot move my car every time she changes her mind. I moved my car. She parked hers. She got out of her car and said ‘don’t do it again’ and flounced into her house. I am so annoyed. I don’t think I’ve done anything wrong but I’m really second guessing myself and it makes me feel nervous about parking near her house again.