Asbestos is a natural mineral that was widely used in building materials in the UK until the late 1990s. Asbestos was popular due to its insulating and fire-resistant properties, making it ideal for use in insulation, roofing, and flooring materials. However, asbestos is now known to be a dangerous substance that can cause serious health problems. When asbestos is disturbed, tiny fibres are released into the air, which can be inhaled and cause damage to the lungs over time.