AMC1 Article 14(8) Registration of UAS Operators and Certified UAS
CAA ORS9 Decision No. 16
DISPLAY OF REGISTRATION INFORMATION
UAS Operators must display their registration number (known as an ‘Operator ID’) on every UA that they operate within the Open and Specific categories.
a) The Operator ID must be displayed in a manner that ensures it is readable when the UA is on the ground, without the need to use any special devices other than corrective spectacles or lenses.
b) The Operator ID must be:
i. clear and in block capitals taller than 3mm
ii. secure and safe from damage
iii. on the main body of the aircraft
c) If the size of the UA does not allow the Operator ID to be clearly displayed externally, or the UA is a model aircraft that represents a real manned aircraft where an external marking would spoil the realism of the representation, a marking inside the UA, in a compartment that can be accessed easily and without the need for any tools is acceptable.
In addition to the compulsory printed Operator ID, a further QR code (quick response code) may also be used. This may link to the CAA registration check service, on the CAA website.
UA whose design is subject to certification are required to be registered in accordance with Annex IX of UK Regulation (EU) 2018/1139 (and Articles 24 to 32 of ANO 2016 unless they are flying under an exemption). Once the CAA has processed the application, the aircraft will be issued with a registration ID consisting of five characters starting 'G-' (e.g., G-ABCD) and the details will be entered into the Aircraft Register. The registration must be displayed permanently on the aircraft in accordance with Article 32 of the ANO.