ceiling extractor

So I'm in the top floor flat with the roof above me. now I've read the survey and there is asbestos in the roof. so there's these vents I'll uploads pics or similar to explain but can the asbestos come back through the vents? They're round similar to below with the flexible tube onto them.

This is a section of my flat roof extension. The top rafters simply support a suspended ceiling below the original ceiling. The bottom ones are only approx. 500mm short and are placed inside the RSJ that supports the building and connected to the frame that supports the roof light, I cannot...

I have a bathroom in the loft which need a ceiling mounted extractor fan. I`m struggling to set my mind on what I have to buy and install. I came across some inline model which seems very powerfull but not sure how this will be installed under the ceiling and how easy would be to replace in the...