Cheers.
Came across these
x8 50mm Drone & Model Aircraft Operator Registration id Stickers CAA Req x8 50mm Drone & Model Aircraft Operator Registration id Stickers CAA Req: Amazon.co.uk: Car & Motorbike
https://www.ebay.co.uk/itm/333565377208
https://www.ebay.co.uk/itm/124074586137