And the first I knew of it was when water started pouring through the light fitting in the dining room below 
It has tripped the fuse switch so we have no lights (which I can live with) but it was making a squeaky type of noise for quite a while after.
I've no idea what I should be doing. ive dried as much as I can see with the light on my phone and I won't be turning the lights back on for at least the next 48hrs whilst it dries out but have I missed anything?
I really could kill dd right about now