Hi there,   we have recently bought a ground-floor maisonette.   The property was built mid-60s.   The floor is concrete, as far as we can tell it's got about 5-6cm of screen, then it's currently got bitumen adhesive (asbestos-containing), tiles (asbestos-containing), and laminate on top of that. Walls are 10cm cavity walls (internal softblock, external bricks) filled with some white cotton-like material that I guess is some kind of mineral wool. On top of