Hi all, I have read other ceiling crack posts but can’t quite find the answer to mine. I live in the ground floor of a converted Victorian building with 3 floors above me. I got home today to find a 1.5m long crack has suddenly appeared in my lounge ceiling from the corner of the chimney breast. It’s less than 1mm wide but it seems surprising how suddenly such a long crack has opened up. Is this something I should just be expecting given the age of the property or should I be getting this investigated? Photos show the crack goes alone the top of the chimney breast then extends across the ceiling from the corner.