I live in rented accommodation and have two spaces allocated to my property, one of which is part of a large paved area without lines on. The people who bought the next door also have two spaces which is part of this paved area. In the past they've parked in such a way that I couldn't park there so I went to knock on their door to welcome to the neighbourhood and ask them to be careful how they parked as I wasn't able to park my car, there was no reply so I sent a nice letter, had it checked by a few people who agreed it wasn't confrontational it was nice and polite. I saw them and discussed it and they were fine, said it was teething problems of moving to a new home, which is fine. I usually park in that paved bit as i get my visitors to park in the other one. A few days ago I got in quite late and parked in the 'visitors' space for convenience (I have to reverse into the other one to get the baby car seat out) and since then theyve parked in such a way I can't park there. A lot of people will say: you're not using it so why be annoyed? But I've had a few visitors who haven't been able to park at mine. Am I being unreasonable to being annoyed they're blocking my space from access? Any advice?