Asbestos is a naturally occurring mineral that was once widely used in building materials due to its fire-resistant properties. However, it was discovered that asbestos fibers can become airborne and inhaled, leading to serious health problems. As a result, asbestos has been banned in the UK since the 1990s, but many older buildings still contain asbestos-containing materials.

Asbestos-containing materials can include insulation, ceiling tiles, floor tiles, and even plumbing pipes. These materials may not pose a risk if they are in good condition and left undisturbed. However, if they are damaged or disturbed, they can release asbestos fibers into the air, which can be breathed in and cause health problems.