Asbestos essentials
Asbestos is the single greatest cause of work-related deaths in the UK.
As long as asbestos is in good condition and is not disturbed or damaged there is negligible risk. However, if it is disturbed or damaged, it can become a danger to health, because asbestos fibres are released into the air and people may breathe them in
The Health and Safety Executive website contains lots of useful information about asbestos.