So the other day I got back from work at 10pm and tried to unlock my front door but i just couldn't do it. The key got to halfway round and then couldn't go any further no matter how hard I tried. After half an hour I walked to my sisters and slept in her
I figured that the landlord must have changed the locks cos they were doing work on the house at the time. I went to see them and apparently they hadn't done anything to it. So I went back home and tried it and it worked fine.
I just realised today that I was turning the key the wrong way.