Asbestos is a naturally occurring mineral that was commonly used in building materials due to its heat-resistant and insulating properties. However, it was later discovered that asbestos fibers, when inhaled, can cause serious health problems such as asbestosis, lung cancer, and mesothelioma.

For this reason, the use of asbestos has been banned in the UK since 1999. However, many older buildings still contain asbestos-containing materials (ACMs), such as insulation, ceiling tiles, and pipework, which can pose a serious health risk if disturbed.