Asbestos is a naturally occurring mineral that was widely used in the UK construction industry until the 1980s. It was popular due to its durability, strength, and resistance to heat and fire. However, it was later discovered that exposure to asbestos can cause serious health problems, including asbestos-related lung cancer, mesothelioma, and asbestosis.

Asbestos-containing materials (ACMs) are still present in many buildings in the UK. These materials can release asbestos fibers into the air when they are disturbed, such as during building work or renovations. That's why it's important to have them tested for asbestos.