I am 14, in the UK and have taken the online proficiency test which I thought to give me a right to fly my models providing I had the Operator ID number labelled in/on the plane. However, I think because of my age, I have not been given/cannot find an operator ID number to put in my plane. I. Think this means that I have to fly with another registered operator over 16 whilst I fly my models which is annoying but fine. However, I am confused as to whether I need to still display an operator ID number on my plane and if so, whose it should be as it may be different people who I fly with.