Ok so here's the deal. I'm at home for the summer about to move up for university in a week. About a month ago I go up to find one of my friends had already moved into the room I wanted, and the landlord says it's first come first serve so I think fuck it, nothing I can do.

So all there is left is another decent room, and a small shitty room that noone wants. I go to the landlord's house and pick up the keys for the decent room, and it is then locked with some of my things in it. I am content.

Today I get a facebook message from the last kid, saying that he called the room I took from the first time we went to see the house (which is true), and therefore he called a locksmith to change the locks on my room, and to make him a new key so he could move into my room.

Is this normal?

In my opinion, that room is my private property... Neither he nor the landlord has the right to unlock or literally break in to my room, take my shit out and put theirs in, just because he was the last to rent his room from the landlord...