If you see a drone being flown illegally, you should immediately report the incident to the police by telephoning 101.

If you are a drone user or otherwise connected with the aviation industry, you can report your concerns via the CHIRP website by clicking on the CHIRP online confidential reporting tab.

If you witness a dangerous or potentially unsafe drone-related incident, you should report the circumstances to the CAA.

You can do this online using its Occurrence Reporting system.