Taceval - Norfolk - pre 1990.
Balloon went up, all reported to respective duties. A young un, with distinct orders not to let anybody "not authorised" into the COC was positioned. Keen and alert, he checked everybody's ID coming into the COC.
This one chap pitched up, looking respective in the rank of Group Captain, showed his ID to attain access. The guard, being alert to the brief, people may turn up with fake ID trying to get into the COC, thought that having no service number on the ID card was a fake, quickly wrestled the chap to the ground whilst shouting Guard Commander, Guard Commander.
A few minutes later, the Staish, hair ruffled, but none the worse for wear entered the COC and took over.
Nobody had told the guard that the boss didnt have a service number on his ID.