Laboratories that analyse building materials for asbestos can be found by contacting the National Association of Testing Authorities. The laboratories can also give you advice on how to correctly take and send a sample. There will be fees involved.
You can also contact an asbestos consultant or competent person for advice by searching the internet or local phone directory.
Please note a safety alert has been issued for the use of near infrared handheld analysers for the identification of asbestos-containing materials.