Asbestos is a naturally occurring mineral that was widely used in construction materials in the past. It was once popular due to its highly desirable properties, such as durability, heat resistance, and sound absorption. Unfortunately, it's also highly toxic.

The danger comes from inhaling or swallowing the microscopic fibers released when asbestos-containing materials break down or are disturbed. When inhaled or swallowed, the fibers can cause mesothelioma, a rare form of cancer, as well as other respiratory diseases like lung cancer or asbestosis.

Many homes and buildings in the UK contain asbestos because of its past popularity in construction. If your home or building was built before 2000, it's likely that it contains some form of asbestos.