Sampling does not require an asbestos licence.
If it has already broken off, you can take the sample yourself if there is no risk of spreading debris or exposing yourself to dust.
Point out your site hazards to sampling teams, including means of safe access to heights. Provide them with keys, etc.
You and your employees should keep well away during sampling. The samplers normally need respiratory protection.
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Asbestos: The survey guide
Selecting a competent surveyor
Search for a UKAS accredited laboratory 
9. Testing for asbestos