Too old but still want to join in the fun? Why not join as an adult volunteer? Whether this be as a civilian instructor, uniformed officer or even uniformed non-commissioned officer, get involved!
As an adult volunteer you will be the backbone of the organisation, by supervising the cadets on the activities that they do. Without adult volunteers it would not be possible to run the Air Cadet Organisation. If the ACO sees potential within you, they may recommend you for uniform, allowing you greater responsibilities but also greater opportunities within the organisation.