Asbestos is a naturally occurring mineral that was commonly used in building materials in the past. The durable and heat-resistant properties of asbestos made it a popular choice for insulation, roofing, and flooring products. However, long-term exposure to asbestos fibers can cause serious respiratory issues, including mesothelioma, lung cancer, and asbestosis. Asbestos was banned in the UK in 1999, but many buildings still contain asbestos-containing materials, especially those built before the ban.