Of course, as a member of the Air Training Corps, it would be pretty difficult for the powers that be to take any sort of action given that the ATC is funded by the MoD and, IIRC, its aim is to foster air mindedness amongst youth. Also, when I was in the ATC (happy days), one of the activities we got involved in was wireless/radio.
The following site is probably of interest on the military side:
Yorkshire Aircom TADs
I have absolutely no connection with the site whatsoever, and cannot say whether the information is accurate. From that initial link, click on Home at the bottom to get access to more information, including callsigns used. There are also some links to other sites on the Home Page.
Good Luck.