Hi, we live in a ex council house built late 1940-1950s. It has a coal shed/ toilet built on the side. The roof is flat, there’s no corrugated sheeting. The roofs been leaking and a huge part of the ceiling fell away It left behind what looked like a mortar mix and a metal grid. There was some visible white “hairs” about an inch long, almost like cat hair. The leak and the ceilings been fixed but since googling I’m wondering if it was likely to have contained asbestos in the mortar mix? I’m really worried as we did this ourselves as a diy project. I know it was a stupid idea.