OK I spoke to this guy this morning. He is an utter coward and a liar. (lots of "he said", "I said" below before I forget).
I waited at the bottom of the stairs and heard him move it, so I walked up and asked him why he keeps moving it and he said he didn't move it, he just brushed past it. So I said how did he brush past it and move it when there is such a big gap. He repeated he just brushed it, then he said oh he moved it 5 inches. Then I said he has moved it into the way of people walking downstairs, and why does he keep doing it every day. Finally he started saying, "This is a communal area, it shouldn't be here", so he finally admitted he has been intentionally moving it.
I explained that I only bring it there in the morning to help my wife who has to carry our baby and he said "Not my problem". I asked how else is she supposed to get the pram down, and it's only there in the morning and completely out of the way and he said not his problem, I must keep it in my flat. Then I asked him if he moved it out past the security doors and he denied it, but then started saying the pram was making the hallway dirty and bringing in leaves, so I said what leaves, and he said "oh it's not too bad today" and we both looked and saw the tyres were clean. I said loads of people trek in dirt on their shoes since there is no carpet.
Whether the pram is sat there in the morning or not, we need to get it in and out the flat, so it's going to go through the hallway. Clearly this **** moved the pram out and put leaves in it as some kind of message.
I don't know why he didn't leave a note there or just wait there to talk to me personally instead of moving it around for the past few months. And putting leaves into a baby's carrycot??
There's nothing much I can do about it now, he says he is going to write to management and have it removed. I think he just got a bee in his bonnet about it being there and started exaggerating things in his head. Now my wife is going to have to leave the baby and our 3 year old alone and carry the pram down herself (even though she leaves about 20 mins after me). She already started holding the baby and pulling the pram upstairs with 1 hand when she gets back since we didn't want to leave it downstairs in case someone messed with it. I used to carry it back upstairs myself when I got home from work.