Why is asbestos a problem? Large amounts of asbestos were used in new and refurbished buildings before 2000. Usage began to decline in the 1970s and blue asbestos (crocidolite) had a voluntary ban in 1970. Blue and brown (amosite) asbestos were banned by law in 1985. Uses of white asbestos (chrysotile) were banned in 1999. Everything else and most second-hand supply (except for very high performance materials) was banned by 2000. Therefore, all supply of materials containing asbestos is banned, including making materials available to a third party in any way, whether or not for any payment. A large number of premises and older plant and equipment still contain some form of asbestos.