Some advice please guys, you were so helpful the last time.
Next door are having a loft conversion put in and my bathroom ceiling which is below and to the right of their loft has now developed a crack that runs the whole length of the wall and a bigger crack a third of the way across that is slight bigger and has dirt and other small particles falling down into my bathroom. Spoke to the foreman who said he couldnt see that it was anything they were doing next door and that he would not have had any reason to inspect my property before they began so he would just have to take my word for it, waiting for him to come and look at the ceiling. I also spoke to my neighbour who said the foreman would have to arrange to fix it as he knows that there were no cracks in my ceiling before the work began as he has been in my bathroom. What type of repair should I expect, would it be reasonable for them to put a bit of filler or silicone in, I have no idea.
Next door are having a loft conversion put in and my bathroom ceiling which is below and to the right of their loft has now developed a crack that runs the whole length of the wall and a bigger crack a third of the way across that is slight bigger and has dirt and other small particles falling down into my bathroom. Spoke to the foreman who said he couldnt see that it was anything they were doing next door and that he would not have had any reason to inspect my property before they began so he would just have to take my word for it, waiting for him to come and look at the ceiling. I also spoke to my neighbour who said the foreman would have to arrange to fix it as he knows that there were no cracks in my ceiling before the work began as he has been in my bathroom. What type of repair should I expect, would it be reasonable for them to put a bit of filler or silicone in, I have no idea.

